worth it's why cassini can't land on satin it may still carry microbes from earth that could affect an alien ecosystem because of the importance of in solid us that cassini has shown us and of titan another potential world that could be habitable for life perhaps not like we know it but perhaps completely different than ours. we had to make decisions on how to dispose of the spacecraft. and that led us inevitably to the plan of taking cassini and plunging it into saturday. cassini's final mission was twenty two dives between saturn's rings and surface then it flew into the planet's burning up misfit. burnet smith al-jazeera. let's get more on this now with astrophysicist francisco diego and london he's

a senior fellow at university college west diego always good to have you with us on al-jazeera let's start with the people crying in the control room just why was this you know such a signature significant moment for the team. the cassini mission has been one of the most successful and one of the most challenging missions in this in the solar system ever. fully thirty years in the making and all these people spend most of their scientific lives and technical lives on this mission so to see a photo from the launch of the conception of this of the of the of the of the space probably itself the collaboration with the european and nasa to put these two spacecraft together the cassini and the huygens and then to launch them on to follow this very. imaginative truck that was using the go with your sister venus twice on the earth once to get all the way to saturn and then twenty. deployed the whole you can sprawl on the on the surface of titan and

then all the discoveries that came on the thirteen years that has been around a fascinating fascinating story and these people have been always there receiving the data finalizing the data processing making it public to see the end of this i think is very emotional even for me. and what did we see a need last moments what did we actually learn by diving into saturn. the diving into. we didn't get any pictures we have to remember that this. transmeta only a few kilobytes per second is not is not the bay i made your data transfer so we cannot send images bark at that speed when the mission is sending in a few seconds so the instruments are cassini which are not images but proper instruments with magnetometers spectrographs spectrometers.

measurements and chemical analysis is what we expect to analyzing the next few days . the composition of the top of the atmosphere of saturn which is still a mystery of hydrogen rich. planet. higher proportion of hydrogen compared to helium are supposed to the sun itself jupiter and all these may come to light a little bit more with the data received in the last few seconds from the from the mission the magnetic field of saturn as well is very challenging very mysterious so we may get some more information about it as well and finally there is some interaction between the rings of saturn and the understeer of south on and we may be able to detect some of these evidence for this interaction and what will be done with all the data that's been collected from cassini its success and spying mission . i hope so certainly there is no follow up mission in

plan but i'm sure in the next few months after the success of this mission there will be other missions that will come and explore not only sutton itself but the mainly as we just saw in your previous in the previous minutes before i came in the little known sort of subtle which are the challenging ones the interesting one titan ansel of those where we may find possibly the conditions for life and perhaps life itself when we go there with with spacecraft so this mystery is there are waiting to be the skull but i don't think the science we want to we're going to wait too long you know little to plan new missions to to this place and i hope not mr diego thank you as always for your time we appreciate it francisco diego live in london. to afghanistan now where the air force has received its first blackhawk helicopters from the u.s. and the latest step towards modernizing its fleet but it will take months before

the aircraft can be years and years before afghanistan's air force can operate entirely on its own jennifer glass explains. the afghan air force says it can change the shape of the fight against the taliban and other groups especially here in kandahar southern afghanistan this is one of afghanistan's few fighter pilots he and his family have been threatened by the taliban so we're protecting his identity . here. he told me the people he's bombing aren't just the enemies of afghanistan they're the enemies of humanity he said that he's proud his country now has power to stand up to them. for decades afghanistan relied on these soviet helicopters but a lack of spare parts means these m.-i seventeen's will eventually be replaced with u.s. blackhawks captains of our much more your has been an air force mechanic for more than thirty years. with the go throughout excited about new aircraft the only way we will get peace in this country that the new technology but the afghans still

need a lot of help they can't maintain and fly all the aircraft they have themselves so u.s. advisors and international contractors fill the gaps to build an air force in peace time is difficult it is a multi-year process to try to do it during wartime is is a herculean effort. american pilots fly with afghans on training missions to hone their skills on this flight air traffic controllers guide the plane around active battle zones. ground crews don't just have to learn how to load planes but how to transport live ammunition to soldiers in the field and for military families perhaps the most important mission is bringing the fallen home second lieutenant dick roula was killed in fighting in central afghanistan his remains are being returned to him in the northeast. many afghans say they want faster larger aircraft but the americans say this fleet is capable and sustainable. your plan is to double

the number of aircraft and increase personnel by fifty percent here at kandahar airfield that means the afghan airports is going to need more space and they plan to take it from the other side of the runway there there's going to be offices training facilities and room for brand new helicopters the first blackhawk flights are expected to start next year it will take years to get the new helicopters fully in service in the meantime the afghans are making the most of what they have. jennifer glass al jazeera at the kandahar airfield afghanistan. we have the sports news still ahead on the news of the cleveland indians the second longest on the. baseball history it will have the details and sport.

time for school elizabeth thank you very much the international and the committee has three if it reiterated that there's no plan b. for next year's pyong chang winter olympics in south korea this off north korea fired another missile over japan on friday at the games a g. to take place in february one hundred kilometers from the north korean border the i.o.c. is new head of ethics ban ki moon is backing the olympics the former u.n. secretary general who's also from south korea is confident the games will go ahead without a hitch. sports has a universal language and it can reach to any place even during a time of cold war even so there is heightened attention on the korean peninsula

i'm sure that this chunk been told in big games will be a great success with a great sense of stability. whenever there was always a sports event. exchanges between south and north at athletes there was a shrewd. expectations and assured of support for sports so i'm quite confident that we will have a very safe very peaceful and how more new. winter olympic games in. next year waivers open disciplinary proceedings after crowd trouble ahead of three one win over cologne in the europa league as many as twenty thousand cologne fans descended on london grinding oxford street to a halt before the march on thursday that despite only three thousand tickets being made available to them footage on social media showed that once they got to the emirates stadium some trying to break down barricades to make their way inside they

also fought with stewards and it flares in the stands the game was close first in european competition for twenty five years also manager asa banger says he's surprised the game even went ahead. they were very clever i don't know how they managed to infiltrate trade. fire and send get everywhere but they did that there were at some stage i thought they would not play the game because of. the police taking any risk really even a society a hundred percent security society and therefore they never take a gamble to play this game when i saw the images on the stadium but i must say our support distilled well with the situation as well and was no aggravation. a surprise upset now in south america's top club competition the couple of the doris argentina's river plate are in the quarterfinals of the competition hoping to repeat their two thousand and fifteen victory but they hadn't planned on it being

so difficult to get past the live in team or hey wilf demand they beat the odds in time powerhouse three nil at an altitude of two thousand six hundred meters in the bolivian city of course. river will be back at home in the return leg and want to star is next week but they'll have quite a deficit because. the cleveland indians now own the second longest unbeaten streak in major league baseball history they not sure twenty second consecutive victory on thursday but this one was a bit tougher than some of the others they needed an extra inning to beat the kansas city royals three to two their full wins away from equalling the all time unbeaten record held by the nine hundred sixteen york giants meanwhile the world series champions the chicago cubs have really been hitting their stride having thrashed the new york mets seventeen to five on wednesday they inflicted more pain on thursday the score fourteen to six in this game the cubs atop of national league

central well the first finalist has been decided at the european basketball championships in istanbul and it was a surprise result savina shocking defending champions spain in their euro basket semifinal they did it in dominant fashion winning ninety two to seventy two the second semifinal is between serbia and russia that's coming up later on friday. a japanese american surfer is continuing to make waves on the global circuit nineteen year old. beat three time world champion mick fanning on thursday to advance to the course fun as the hurley pro in california she was the youngest rookie on the wild surf league last season is expected to be one of the faces of the sport when it makes its olympic debut in tokyo in twenty twenty and that is all you sport for now we'll have more support for you a little bit later on and that does it for this al-jazeera news hour but i'll be back in just a couple of minutes with another news bulletin thank you very much for watching.

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anything is possible and there's never been a better time to change the world. we all have stories. some that enrich our memories. others define our futures. in a breathtaking new season al-jazeera staff members open their hearts and invite us into that extraordinary lives al-jazeera correspondent coming soon. cancer diagnosis that used to be a little red the height of. them are what we're trying to do is really energize them insist that it's like a rocket that can recognize a cell. thinking not finding the capsule that's exactly it you've had some pretty amazing results unless there you can get lucky. techno this time.

all right let's stay with this company. police in london search for a suspect behind an explosion at an underground train station. hello and welcome to al jazeera live from my headquarters in doha with me elizabeth rhonda also ahead. north korea as it carries out another missile test days after new u.n. sanctions. made of cotton says he is ready for dialogue on the gulf crisis bops that the solution must be acceptable to all parties. safe zones and syria's war

will have an update on the deal reached for the province. british police are treating a blast on a london underground train as a terrorist incident the explosion happened on the district line of the city's southwest during the busy morning rush hour the british prime minister has convened the country's emergency committee we will be live and london shortly but first bobby philips looks back at the day's events. it happened on the ground. a twenty in the boarding the height of the rush hour if this was a deliberate attack and that's what the police believe it was timed to cause maximum casualties. this is what we believe caused the explosion just as the train came into parsons green station a bucket still in flames moments later when a passenger on the train filmed it on their camera. but the damage to the

surrounding carriage is slight perhaps someone intended this to be a much more serious attack injured and frightened people fled the station some had burns there was panic several people rushed to hospital almost immediately arriving the. people shell shocked and when i asked what happened they talked about an explosion in one of the carriages. yeah but that it three one of the carriages we had a back. just came. and it was so hot and it just the whole. just calming everybody screaming. and we run out and. we just we were right at the end she just we just jumped the fences and just ran. we are treating the matter as a terrorist related incident and the metropolitan police counts terrorism come on we'll take responsibility for that investigation this is

a leafy residential part of west london a long way from the city center so people who live around here are surprised. that something like this has happened and the police have sealed off a large area around. station meaning an awful lot of disruption to people's lives. recent attacks in london and in manchester have put the british authorities on heightened alert around the world the choo train attacks back in two thousand and five the so-called seven seven attacks in which more than fifty people died. but the advice from politicians and the police is for people to go about their daily lives and across this city today that's what most londoners are doing be phillip's al jazeera pos in the street in london. for british prime minister says the terrorism threat level remains at severe meaning further attacks are highly likely . clearly this was a device that was intended to cause significant harm and twenty two people have

been injured and are being treated in hospital are fought so with all those who've been affected by this attack the emergency services were on the scene immediately and once again i would like to thank them for their professionalism and for their bravery and the peace and security services are obviously doing all the work to discover the full circumstances of this cowardly attack and to identify who is responsible let's go live to our correspondent who's at the scene for us teens looking into as the prime minister was saying what happened and who's behind it mean. yes that's right as more details emerge we're getting a bigger picture of the scale of what could have been a much larger attack we know the met police is counter terror command launched for scale investigation they're drawing in support from hundreds of detectives and

specialists also from m i five the u.k.'s domestic intelligence agency they're poring over evidence we've seen pictures of forensic teams on the ground on the platform of the train and also looking at the device itself we know according to the reason may inform the london mayor study car that a manhunt is now underway it's going to be absolutely critical and crucial for them to work out exactly who was responsible whether there were other individuals involved and most importantly perhaps whether london in other parts of the u.k. remains risk saying that though treason may has decided after chairing the cobra committee meeting not to ramp up the security threat level in the country remain to .