hillary clinton and donald trump close in on one on one showdown, but other challengers say the race isn't over yet. >> and i'm live in washington,

d.c. with special coverage and analysis of those super-tuesday results. the u.n. prepares to decide whether to slap more punishing sanctions on north korea. gulf countries declare lebanese group, hezbollah a terrorist organization. plus -- >> i'm rory challands at the moscow museum of cosmonautics, experiencing just a little bit of what the men who just returned to earth experienced after nearly a year in space. ♪ ♪ so republican donald trump and democrat hillary clinton have proved themselves to be the undisputed front runners for the u.s. presidency. they are not under pressure to shake off the other challengers. al jazeera has special coverage

out of washington, d.c. with felicity barr. >> thank you, dareen, yes, americans are digesting the news that it is trump and clinton who are likely to go head-to-head for what is arguably the most important leadership role in the world. it isn't quite over yet. but both are now focusing on key upcoming races in florida and ohio, and they appear to be unstoppable. trump swept across seven states mostly in the south scoring big victories. his closest rival was ted cruz who won in three, including his home state of texas. marco rubio claimed just one state, minnesota. for the democrats it was a successful night for hillary clinton. she won overwhelmingly in the south. like trump she took a total of

seven states. her one rival, bernie sanders didn't go home empty handed, however, winning minnesota, colorado, oklahoma, and his home state of vermont. all right. in a moment we'll be live with our correspondent. we have add dam fisher in houston, and andy gallagher is in alabama. first, though, john hendren looks ahead to the next big battle, the state of ohio. >> reporter: if you want to become an american president, history says you have to win here first. >> mr. donald j trump! >> reporter: every candidate has been here, and will be here again and again. >> you have every part of the country represented here in ohio.

>> reporter: the state's mix makes it the state that more than any other is known for picking presidents. >> now is one of probably a dozen battleground states for the presidency. only a dozen, out of 50 states there are only about 12 where there is a real contest going on. and that has been ohio for years and years. >> reporter: in the general election the mirror has long cast a strikingly accurate reflection of what happens in the nation when all votes are cast. ohio has become the gateway to the white house, since 1964, every single president have all had to win here first. on average, the state votes within 1.3 percentage points of the national vote tallied for the first time, millennials will match baby boomers as a share of

the electorate, and they bring their own issues. >> we have grown up in a time where there has been a lot of economic hardship. >> that goes for young democrats. >> i can afford for a republican to be in office, but for a lot of people that are part of a marginalized communities, they cannot afford four years of a republican. >> the reason i believe it should be bernie sanders because of 40 years of consistent prerogative policies. >> we're very, very vested in making sure we protect gay rights. >> reporter: and it goes for young republicans. >> i'm for donald trump because i want to make america great again, and build the wall. build that wall. >> donald trump is the man. >> he is the man. >> and he tells it how it is. >> reporter: all of the candidates will campaign here aggressively, because they know if their dream of the white

house is to become a reality, they must win here. >> one of the big states up for grabs super-tuesday was texas. and ted cruz managed to take that from donald trump. >> reporter: he certainly put himself in an incredibly strong position. he knows historically the candidate who wins more states on super-tuesday does go on to secure the candidacy. they need to look at what message they need to tweak and what they need to be seeing as they go on into ohio and florida. and we'll let this truck go by, and then resume. the cruz campaign will be looking at the detail which

suggests that voters who believe the candidate that shared his values tended to vote for cruz, the voters looking for change tended to supported trump. marco rubio can look at the figures from virginia, which suggested that voters who were making their mind up just in the last couple of days were breaking for rubio. that's important because you know in the last four or five days we have seen marco rubio get much more aggressive against donald trump, suggesting that perhaps he was a con man. and so that will perhaps give him an idea, particularly with the republican debate coming up in just over 24 hours time, that he needs to step up the attacks on donald trump. looking statesman like isn't for marco rubio when it comes to the debates, he can do that in his speeches on nights like super-tuesday, instead he has to go after the front runner.

donald trump will be saying look, i won in alabama, i won in massachusetts, when it comes to republicans that is thought to be fairly liberal. if i can win in both of those states, i'm a credible candidate to win anywhere in the united states, and that's why the republican party should be getting behind me now. ted cruz and marco rubio in their speeches on super-tuesday said the other candidate should drop out and allow them to go head to head. that simply isn't going to happen. we have five candidates, with perhaps three being realistic. after super-tuesday we have five candidates, with perhaps three being realistic. but donald trump continuing to make all of the ground. >> alan thanks so much. let's take you from texas to florida. and join kimberly halkett in miami. >> reporter: of course, i'm

standing in many one of the delegate rich states. hillary clinton did not lock out her main rival on super-tuesday has she had hoped. this is one of the southern states. she achieved that through the thanks of the hard work and support of african american, latino supporters, supporters who are woman and over 45 years old. but she started to cut into bernie sanders traditional support in this race, in the under 45 crowd. florida is reflective of everything that is representing hillary clinton. we have the older voter. we have a very diverse state here, and so that is what hillary clinton is counting on. she is campaigning in new york city where she is kicking off

her post super-tuesday rally. with their populous themes and messages, and she is one against reiterating that message we heard more than ten times in her post-super-tuesday speech and that was about breaking down barriers for those who are frustrated with the way that washington works. let's move now to andy gallagher. he is live in selma, in alabama. and just explain how could a clinton versus trump general election play out in those southern states? >> reporter: well, i guess this is a great opportunity to talk about hillary clinton's southern firewall. behind me you can see the edmond pettis bridge, the location where bloody sunday happened back in the 60s. the cradle of the civil rights

movement. bill clinton was the governor of arkansas for many years, a man seen as being easily able to move between the races, very comfortable amongst black voters, as he is with white voters. and in these southern states african american voters have gone to the polls in huge numbers for hillary clinton. we saw that in south carolina. we saw that here in alabama. when it comes to a general election, it's very unlikely that hillary clinton can win these southern states. they have been deeply red, deeply republican for the last four elections, in fact from the 1960s. but when you look at the next races in ohio and florida, they are far more representative of what this country is like. the demographics are there. if you look at ohio and florida, huge hispanic votes there. those are the people that will be galvanized to get out and vote to make sure that donald trump doesn't win, and they will always vote for hillary clinton. she is looking like the

inevitable candidate post super-tuesday. bernie sanders is far from being out of this race, but when you look at the states that are coming up next, hillary clinton is starting to look like then ef have itable leader. >> andy thank you very much. and i'll be back in a few hours with much more on this extraordinary race for the white house. >> thank you. but we go back to the united nations the states. and what you are see right now is the security council voting on a resolution which would slap tough new sanctions on north korea. let's just listen in for a moment. >> i should like to take this opportunity to pay tribute on behalf of the ambassador

[ inaudible ] representative of the republic of venezuela for his service as president of the council for the month of february. i'm sure i speak for all members of the council, in expressing deep appreciation to the ambassador and his delegation for great diplomatic skill with which they conducted the council's business last month. in accordance with rule 37 of the council's rules of procedure, i invite the representatives of albania, australia, austria, belgium, canada, chile, croatia, cyprus, the czech republic, denmark, estonia, finland, germany,

greece, hungary, iceland, iraq, ireland, israel, italy, ka sack stan, latvia, lithuania, malta, the netherlands, norway, the philippines, the republic of korea, romania, slovakia, sweden, turkey, uruguay to participate in this meeting. it is so decided. the security council will now begin its agenda.

members of the council have before them document s-2016. -- s-2016 stoke 202. for canada, chile, croatia, cyprus, czech republic, denmark, estonia, finland -- >> okay. so speaking right there is the ambassador and he is basically calling for that vote on north korea. so our diplomatic editor james bayes standing by listening to what is going on. james just talk us through what we have seen and what we expect to see. >> reporter: this is the procedure, first of the month for angola, it's just taking its role as president this month, you heard a list of all of those

countries. they are all of the cosponsors of this resolution, and shortly, you are going to see this resolution put to the vote of the security council. i think that's going to happen very soon. let's listen in again. >> sweden, turkey, ukraine, united kingdom, united states, uruguay, and vanuatu. >> reporter: not quite there yet, still reading the very long list of cosponsors for this resolution, but as you hear them saying, they are ready to proceed to the vote. let's watch those 15 hands. >> i shall put the draft resolution to the vote now. will those in favor of the draft resolution contained in document s-2016-202 please raise their hands.

the result of the voting is the following: the draft resolution received 15 votes in favor. the draft resolution has been adopted unanimously as resolution 2270 -- >> reporter: so there you have a unanimous adoption by the undersecurity council. the important vote to watch was russia, because russia had had some problems with this resolution, mainly negotiated between the u.s. and china. in fact it went all the way to a phone call between the presidents of these two countries to negotiate this resolution then shared with the rest of the u.n. security council, and now past. more sanctions than ever before on north korea. the u.s. ambassador, samantha

power now speaking. >> in looking at north korea, it can at times feel as though one has seen two entirely different realities. one, is the dprk that is expending tremendous resources in pursuing advanced technology to build an intercontinental ballistic missile, capable of carrying out a nuclear strike a continent away. the other is the dprk, in which according to an assessment, 25% of children under the age of five suffer from stunted growth as a result of chronic malnutrition. one is the dprk in which the government brags about carrying out nuclear tests like the test north korea carried out on january 6th. the other is the dprk in which individuals must endure the

searing pain of seeing generations of their loved ones starve to death, like the north korean defector who joined us just a few months ago who's grangd mother, father, and two brothers had all died because they could not fine enough food. it could seem as those these realities have nothing to do with one another. yet as we all know, they have everything to do with one another. part of the perverse reality that has no equal in this world. the chronic suffering of the people of north korea is the direct result of the choices made by the dprk government, a government that has consistently prioritized its nuclear weapons and ballistic missile programs over the priorities of providing for the basic needs of its own people. virtually all of the resources are channelled into its reckless

and re -- relentless pursuit of weapons of mass destruction. they would rather grow their nuclear weapons program than grow its own children. of course the dprk's obsessive pursuit of weapons of mass destruction causes profound suffering for the people of north korea and causes a growing threat to the region and the world. with each nuclear test and launch, the dprk improves its capability to carry out a nuclear missile attack in the region and a continent away. in that means having the ability to strike most of the countries sitting on this council. north korea is the only country in the entrier world that has conducted a nuclear test in the 21st century. it has conducted not one, but

four. in 2006, 2009, 2013, and now 2016. it is also the only u.n. member state that routinely threatens other countries with nuclear annihilation. our collective security demands that we stop north korea from continuing along this destructive and destabilizing course. yet, we have got to be honest, that while previous efforts, including the previous sanctions resolutions have undoubtedly made it more difficult for north korea to advance its weapons programs, the regime continues to plow ahead, as it demonstrated the last two months. that is why the resolution we have just adopted is so much tougher than any prior north korea resolution, and why it goes further than any sanctions regime in two decades. we have studied the ways the

dprk has been able to exploit gaps. >> reporter: the tougherest sanctions in 20 years. the words of samantha power, and the u.n. security council unanimously passes its resolution on north korea in response to north korea's nuclear test. while they were negotiating this resolution, north korea launched another satellite launch. this is actually some 20-pages long when you read it, trying to work through the loopholes and work arounds of the current sanction's resolution. also if you read the sanctions resolution, it has not some things that are supposed to target the leadership of north korea themselves. on the last page, you find

sanctions on things like jet skis and snowmobiles. >> reporter: so james, what does the international community think it can do more of seeing as -- as you have just said, north korea is already subject to four rounds of u.n. sanctions? >> reporter: well, it's a very detailed list of things they have added, new names, new front companies they are trying to cover. north korea does change the way it does these things. it changes the names of the companies it uses to illegally import things to its country. so it is trying to do that. they are certainly the most extensive sanctions for 20 years that have been put in place by the u.n. security council, but the big problem in the end is about the implementation. i think in some ways the country to look at closely there is china, because china is north

korea's closest trading partner. the chinese were involved in very long negotiations with the united states about this resolution, which is now in place. >> okay. james, thank you for that update from the united nations. the u.n. has unanimously adopted that resolution, imposing tough new sanctions on north korea. other news jordanian security forces have killed seven men during raids in fighting in the city of idlib. they were holed up inside a palestinian refugee camp inside the city. the jordanian authorities saying they had links to isil. our correspondent jane arraf is there and explains more. >> reporter: authorities are describing this as a successful attempt to foil what would have been a major attack by

isil-related groups on jordanian civilians and military installations. this centered on an overnight raid where special forces closed in on a residential compound in the palestinian refugee camp. seven fighters were killed, some wearing explosive belts. a police officer was also killed and more than 30 people were arrested. jordan has said because of its proximity to syria and iraq, it is at risk of serious threats from isil. and isil sympathizers here in jordan. they were described as outlaws by jordanian official, indicating -- because it didn't say they were a different nationality, that they are in fact jordanian, and that has been very much home-grown threat here in jordan for many years. the gulf cooperation council

has formally designated hezbollah as a terrorist operation. the move by the block of six gulf nations deepens a growing rift with lebanon where hezbollah is a leading political power. in 2013, the gcc imposed sanctions on hezbollah members in response to their intervention in syria's war. saudi arabia announced it was cutting $4 billion in aid to lebanese security forces, and issued traveling warnings. on tuesday the hezbollah leader sharply criticized saudi arabia for the punitive measures, and insisted they would remain in the coalition government. earlierly i spoke with a political analyst based in beirut. >> hezbollah is part of a coalition that is actually fighting a war in one side, and there is another coalition

fighting a war on the other side, so -- and the statement that came from the leader of hezbollah is very clear. he accused saudi arabia of sendisen sending those car bombs to beirut and the rest of the area where there is loyalty to hezbollah. in the end i think hezbollah declared that he wanted to end the regime of saudi arabia, and the regime in saudi arabia, and that's a statement that actually declared by the leader as the saudis, actually they are trying to destroy hezbollah wherever they can -- can have or they have their hands on it. >> tensions are high in eastern iraq where isil killed more than 40 people during a suicide attack on monday. shiite militias have reiterated a call for sunnis to leave the

area. five sunni civilians were killed and two kidnapped on monday alone. the u.s.-lead coalition has carried out 21 attacks in syria. on the ground iraqi security forces and shiite militia have launched an operation to try to dislodge isil fighters in the western desert. rebels have attacked the indian console late in afghanistan. gunmen had previously targeted the city. five of the attackers died two after detonating suicide explosives. another least two civilians have been killed, and that number is expected to rise. no group has claimed responsibility for the blast. tony has more. >> reporter: according to an afghan government spokesman it took security forces just 50 minutes to end this attack.

it left five dead, one we understand blew himself up in a car packed with explosives, the entrance leading to the indian console late. one of them detonated his suicide vest and three others were shot dead by security forces. they had made their way to a house from where they were trying to launch an attack, but they were overpowered and killed. it did leave, unfortunately, civilian casualties, because this is very much a residential area. the indian console late in particular, are very much under the target of the taliban and other extremists groups, because they see the indian government as using afghanistan as a platform to destabilize their allies in pakistan, but this bombing happened at a crucial time, because it was hoped that taliban would attend very important talks in pakistan with the afghan government, some kind

of recourse to try to find a solution to this problem. the taliban are growing in strength week by week. but of course this kind of attack could be counterproductive. it could cause the afghan government to say, well, when you are doing this, we're not going to talk, and that's the crucial point at the moment. at least 20 kurdish ypg fighters and 10 civilians have been killed in fighting with isil. the attack was in retaliation to assaults by isil in syria's northern province over the weekend. the war in syria has destroyed much of the country's infrastructure, but some have started up again over the border in neighboring turkey. our correspondent reports. >> reporter: like millions of fellow syrians, this man lost

his livelihood in damascus. it clothes factory was destroyed four years ago. making him almost bankrupt. but along with his business partner, they never gave up. he opened a factory here, employing most of his old staff. 130 syrians work here, making around 1,000 track suits a day. >> translator: i want to live, work, and start from scratch. we have little money left, and if i don't make use of it, then i will be bankrupt. >> reporter: turkey hosts more than 2.2 million syrian refugees. it is also attracting wealthy investors. turkey provides stability, factories, raw materials, and is near syria. there are more than 350,000 syrians living here, and many have their own businesses. in this street alone, there are at least ten shops owned by syrians, while syrian

businessmen have started small, medium, and large factories here. the turkish ministry of labor and social security says 6,000 syrians are registered as company partners. 600 are registered with the chamber of commerce. but syrian business owners say there are around 2,000 factories in this city. signs in arabic are easily spotted here. many business people are also eager to return home to syria. >> translator: i was forced to open it. without my craft i can't move or do anything. i ware by god if things calm down tomorrow morning, i will return back to syria by the night. >> reporter: turkey offers will syrians refuge and good business opportunities. for those who became successful, the return to syria is worth starting everything over again. macedonia has briefly opened its boarder to let refugees cross over from greece.

but thousands still remain stranded on the border. the united nations has warned of a humanitarian crisis building as refugees struggle with the cold weather. balkan countries have put in strict restrictions on the number of refugees crossing over to make their way to western europe. hoda abdel hamid is on the greek macedonia border. how long will the border remain open? and how many refugees have been allowed to cross over? >> reporter: well, as we speak now the border is open. again, the pattern we have been observing is that it is opened for a brief period, about two hours, at a time, about 100 people, maybe, sometimes 70 are allowed through, and then it closes down again. that's because there is also a new registration process happening at the crossing point. there is a new paper that these refugees have to have, and if they go through, then they will

be able to make it all the way into western europe, the route taking them through macedonia, serbia, croatia, slavonia, and finally on to germany. but there is an estimated 10,000 people who are here, waiting in this makeshift camp, which is growing really by the day, and i was looking around earlier on, it's really beginning to have a sort of near permanent feel to it. we have seen tractors that are there, levelling the ground in preparation for the newcomers so they can find a spot to put their tents. we have seen people arriving carrying their luggage and blankets. so certainly this is something that is going to be for the long haul. before you manage at that rhythm -- before you manage for all of these people to go through, it will take a very long time. there are still people who arrive on a daily basis, so all

of that will take a long time. and we have heard in the greek media earlier, that the authorities here are preparing themselves that maybe some of these refugees will have to stay in greece for a long time. >> hoda, just give us a sense of -- we can see some of the tents behind you, but tell us about the conditions that these refugees are living in and facing, and what they have been telling you. >> reporter: well, certainly it's very difficult conditions to the point that some of the people, the ones who are most exasperated will tell you, is there a way for us to go back? because this is going to be very difficult. there is food distribution, but at the moment aid organizations are struggling. it is a logistic call nightmare just by the sheer volume of people who keep arriving here. so people are sort of getting help, but not much. now the weather is turning, the temperature has dropped.

forecast is that there will be rain overnight. we have been watching people digging trenches around they tents trying to keep the water out of their tents. and you also people trying to go into the forest to find wood for fires. and there are a lot of volunteers on the ground who come here, open up the back of their car and distribute all sorts of items, but it's surely not enough, and there is really not a system in place for this amount of people. you see those big tents at the back there, the white tents, that was the official transit camp, and the situation was contained within that camp, you have the various aid organizations, doctors without border, everything was there, and a food distribution point, but it was not ready for this amount of people.

it was ready for about 1,500 at the most. noul we're talking about nearly ten times that number. >> okay. hoda thank you for that update. now what is happening in northern france is that police in the port of calais are continuing to demolish the so h southern part of the refugee camp known as the jungle. france wants to move a thousand refugees and migrants from that camp. more than a dozen humanitarian organizations have accused authorities of brutally evicting migrants. a 7.9 earthquake has struck indonesia, and a tsunami warning has been lifted in the last hour. the indian student arrested on sedition charges has been

granted bail for six months by the high court. he was arrested after he and other students held a rally against the man convicted for the 2013 attack on parliament. 60% of iran's population is under the age of 30, but their prospects for getting a job aren't looking bright thanks to a stagnant economy. jonah hull has been talking to young adults about their hopes and the challenges they face. ♪ >> reporter: tehran's grand bizarre. one of the great experiences on a city on the shift of change. in the bizarre it is business as usual. these two are shopping for traditional wedding jewelry, and they are finding it expensive. in iran where 60% of the

population is under 30, and one in four of those young people are out of work, getting married is a luxury many can't afford. >> translator: if living costs went down, young people would be more inclined to get married and build families. so many of my friends and family aren't getting married because it's just too expensive. >> translator: when we were under sanctions, it was very difficult, but gradually as sanctions lifted people are under less pressure. >> reporter: the lifting of international sanctions, following a nuclear deal with world powers paved the way for big advances by moderates and reformists in last week's parliamentary election. those who voted for them are imparent for results. the grand bizarre is made up a ward of corridors. the bussel of commerce has been taking place here for centuries, dating back to when tehran was just a village.

it's not a village anymore. and for its young, hanging out in a fledgling cafe culture offers a different way of life. >> translator: i do feel that there is an underground life in this city, underground fun, underground socializing, underground theater, all of this despite the existing difficulties. >> reporter: she is a sociology graduate, who has turned to sellisel sellisel selling pistachios. >> translator: personally we would prefer to have more freedom, freedom of all kinds, and freedom from being watched and supervised in everything we do. >> reporter: this generation is finding its own way in a world where facebook and twitter are banned, pop music censored, and until recently bloggers frequently arrested.

the change they crave may now be upon them. the misuse of prescription drugs kills more people in the u.s. than road accidents. that's according to a new report commissioned by the u.n. neave barker with the details. >> reporter: there's a fierce global debate on how best to tackle the world drug problem. since the 1970s, the u.s. has lead a zero tolerance war on drugs. but the latest u.n. report urges a balance of punishment and treatment. the scale of the problem is huge, especially in the west. last year, one in every five drug-related deaths worldwide occurred in the united states. that's an average of 45,000 per year. an increase in heroin use has had a big impact, but the biggest factor is the misuse of

prescription drugs that in many u.s. states are killing more people than car accidents. the problem is also growing in europe. in the last year 602 psychoactive sub chances have emerged. tracking, monitoring and controlling these new substances is a major challenge for the authorities. in afghanistan the cultivation of opium decreased for the first time in six years. however, production is still very high, and still a major problem. meanwhile, drug addiction in west africa is increasing, mostly because the area is being used as a transit point for drugs into europe. the report also addresses the lack of useful drug availability, especially painkillers. in south africa, and south asia, pain relief is very limited, while europe and north america

consume 95% of all pain medication. the report offers a survey of the drug-control situation around the world. it's now down to the u.n. general assembly, to come up with taylor-made solutions to this problem. after a 340-day mission, an american and russia have returned safely to earth. they are the first to spend a year in space helping take one giant leap towards putting boots on mars. rory challands reports. >> reporter: they bid fair well to their colleagues and then closed the hatch on the time in space. >> one of the big unknowns about any kind of interplanetary human exploration, that is sending humans to another planet like mars, is how well will the human

body stand up to long-term exposure to weightlessness. we know just from studies on board the space station that the astronauts undergo things like bone loss and muscle mass loss over time to the tune of something like 1.5% of their bone mass each month. >> reporter: after their journey back to earth, they safely landed in the snowy wilderness of kazakhstan. they were supposed to exit the capsule themselves like they would have to after landing on mars, but the delil taiting effects of a long time in space were clear, and they were too weak to do this. kelly is now the u.s. astronaut with the most consecutive days in space, any serious enthusiast will tell you the absolute record belongs to a russia. >> translator: in 1994, '95, our

compatriot set the absolute world record of 437 days. that's almost enough time to fly to mars and back. his work was very important. >> reporter: of course nothing actually replicates the experience of re-entry, that's something you have to do yourself here at in this museum, it shows how crowded it is inside of this tiny capsule, and it shows how the vacuum and extreme temperatures of space are just centimeters from their head. museums like this are a testament to how much excitement human space flight exists. rory challands, al jazeera, moscow. let's talk about with our

expert. doug, we'll talk about the exhibition in just a moment, but first let me ask you about what you are looking for after the astronauts have landed. what are you looking to see? put this in context for us when it comes to possibly a future mars mission. >> well, your introduction illustrated some of the challenges. essentially when the human body leaves earth, it starts to fall apart. we are of this planet. we have evolved with one g and as soon as that force of gravity is removed, then our bodies start to change. so this mission, perhaps more than any other has run a whole raft of experiments to see how pretty much every bodily function is affected by weightlessness. the unique feature of this particular mission is that one of the astronauts has a twin

brother. he is on the ground carrying out equivalent experiences to his brother. so mark is the control experiment, if you would like, for all of the data that is going to be produced by his twin brother. >> yeah, that's interesting. because the bodies will be compared to analyze any genetic changes they might find. so when it comes to a future mars mission, what do you think about that? >> it's a long way off in time as well as in space. we can land robot craft on mars, but so far we don't really know how to land a human-rated spacecraft. and of course the body is going to be subjected to around about 18 months of weightlessness. mars you have some gravity, but not as much as on earth. it's very much about the change between the two. just as we have seen with kelley

and his crew mates landing earlier today, they are so weakened, so it will be the change from the journey to mars, to landing on mars, and then when they come back from mars after that really long mission, how are their bodies going to be able to cope with the return to normal. that's the big challenge. >> and for you as senior curator, let me ask you how you are covering this, if at all? and what is it about space travel that really fascinates audiences in your opinion? >> oh, well, your last question is easy to answer. people want to know what it is like. they want to know what it is like to be in space looking down on earth. for those few astronauts who have been to the moon, what is it like to look back on earth? in the exhibition, towards the end of the exhibition, we do look ahead. we -- we look at how the decision will have to be made

whether to send humans to mars as is being planned, or to carry on with robotic exploration, which is a lot easier and cheaper, but hopefully one day humans will go to mars, because we can bring something that no machine can bring to exploration. >> thank you, doug. >> thank you. still to come on the news hour, all of the sports news, including -- >> reporter: i'm lee wellings in london, when the olympics moved on, it didn't stop the big events from taking place here. ♪ ((úz@úxóxkxñ($9

♪ time for the sports news with andy. >> thank you so much, dareen. tottenham has the chance to go top of the english premier league. the last time they were at this stage, way back in 1964. they have their chance after they could only draw 2-2 on tuesday. they are away at west ham. their manager insisting his team aren't being effected by the pressure. >> we don't feel that. only for us it's important to keep our level, our fitness, our mentality, and we'll see what happens. it's too soon to start to speak about the end of the season. >> let's have a look at how the table is shaping up at the moment. manchester city will face

liverpool. city winning that one on penalties. >> that's what we want to do is use -- transform the negatives around us into positives, and create even more solidarity, and let's not go overboard. we do not play to be relegated. you play for the premiership, and that's why we have to put the criticism in the right place. >> real madrid coach says his team are united ahead of their match. in response to comments ronaldo made on saturday, he said if we were all at my level maybe we would be leaders. he has since apologized. >> translator: we know how important christiano is, and

we'll all with him. the issue is sorted out. the most important thing is what we have ahead of us. we'll solve this situation ourselves all together. inside, not outside. games in france could be moved or played behind closed doors in response to security concerns with 100 days to go, organizers say it will take exceptional circumstances for them to consider making any changes. $35 million is being present on private security in response to last year's paris attacks. >> we are preparing for 51 matches. it's according to schedule. we have always certain numbers of measures if something will need to be changing due to an event which would happen, bad weather, or security issue. asian champions have suffered another setback in the defense of their title.

the chinese team beaten 2-1 by sydney fc. south korea now top this qualifying group. one of kenya's top athletes has blamed his counting try's young runners for the ongoing doping crisis there. kenya has been given until the start of next month to comply with the rules of the world doping agency. he says the country still lacks suitable testing facilities. more than 40 kenyan athletes have failed tests since the last games. >> if you put it in percentage, it is very few, but the young are a big problem, because nobody knows them, and they get out there, compete for the first time, they are being caught. but that is good, because it

shows that -- the anti-doping agency also they are doing their job. with five months to go until the rio games, track cycling world championships is getting underway in england. from where lee wellings reports. >> reporter: the organizers of any olympic games will tell you about the importance of inspiring the public and creating a real legacy. what about the legacy of the 2012 london olympics. it was a huge success. as was the paralympics, but when it was over there was really question marks about public participation in sports, about access to playing fields. people aren't convinced. but what is indisputable is the continued staggering success of the british cycling team. and they will be expecting more medals here in the next few

days. it has been an incredible story starting a decade ago, where the master coach with his attention to detail, made sure that our british team went on to win seven gold medals on the track alone in beijing, and followed it here with another 7 on the track in the 2012 olympics. he has now gone on to concentrate on team sky, but now they can join an experienced team. i'm not sure we're allowed to be this close, but you see this track. it's siberian pine in a venue that cost over $150 million to build. and the public are making use of it, because for two years, over 1.5 million people have visited here and the park is part of the bigger picture, the part of a regeneration. they won't be using it this

week, because the world championships are taking place, but there will be spectators, and most of them will be roaring on the british cycling team. in the cycle of four years, it's all about picking the olympics. so the main focus is obviously on rio. a quick look at a really interesting encounter in the nhl. the first and second picks of the 2015 draft, meeting on the ice for the first time. the edmonton player getting the better of the two. david scoring twice, including the game winner in overtime, just after his opponent had missed a chance. the teams aren't doing so well though, both are among the league's bottom five. plenty of more sport throughout the day, what if that is it for now. >> andy thank you. thank you for watching. we'll now hand you over to our team in london.

they'll have more news coming up in just a moment. ♪

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al jazeera america. north korea to face tougher u.n. sanctions over its missile program after a yunanimous security council vote. ♪ hello, for me, david foster, you are watching al jazeera live from london. good to have your company. this is also what we have coming up in the next 30 minutes. victorious on super-tuesday, donald trump calls on republicans to back him in what is looking now like a straight contest with hillary clinton. jordan says seven men killed in a raid by special forces were linked to isil and were prepar