the turkish president says a russian jet ignored warnings to leave his country's airspace. ergodan says the downing of the jet was justified. you're watching al jazeera. also ahead russian president vladimir putin insists his country did not violate turkish airspace and plans to suspend cooperation with ankara. a suicide bomber blew up a bus carrying presidential guards and a state of emergency has been declared. a protest in chicago after a police video is released showing

a white officer killing a black teenager. russia says one of the pilots drowned by the turkey on tuesday is safe by being picked up by the syrian army. the other pilot is dead. meanwhile, the turkish president says he doesn't want it to isolate. turkey is saying the jet entered its space for 17 centers. it is also warning turkey of serious consequences. here is what turkish president erdogan said a short while ago >> translation: turkey is never on the side of tension or advocacy.

-- we do not have any intention to escalate any situation. we are only defending our security let's get more from the turkish/syrian border. what more have been hearing from the turkish side in the aftermath of this shooting down of the russian plane? >> reporter: they're saying that the shooting down the russian military plane was not a belligerent act; it was a legitimate act of defense. the warnings were ignored ten times and then they had to take action. if you listened to that same statement by the president, he was mentioning another element to the story which is basically he said that we told the russians that there is absolutely no presence of i.s.i.l. in latakia and that their attacks against latakia are aimed against tarman

minority. -- turk man. they said in terms of those entice tied attacks in areas of on the border of turkey. they're saying that-- the turk curb are saying if russians are serious about taking on i.s.i.l., they have to go to the main strong hold where the fight should continue. the general sentiment among the turks here is that russia ausing the attacks against i.s.i.l. is as a pretest and their-- pretext and the real motive is to regain some of the affidavit bashar al-assad lost over the last four years to what extent is turkey looking to their allies in nato and the international community for support on this?

different key allies, nato, president francois hollande and american president obama, are showing signs for support of turkey, saying that turkey has the right to defend its integrity and security and airspace. i think that the turkish president ergogan today says it it's for the international community to step in and to find a permanent solution to the crisis in syria because the turks have repeatedly saying that as long as bashar al-assad continues pounding and killing civilians, the crisis will continue, it will spill over and what happened yesterday could appear again -- happen again over to moscow.

to our correspondent. what was the fate of the second russian pilot? >> reporter: vladimir putin, the russian president, has been briefed on the fate of the second crew member of this downed jet. we heard about an hour ago through the russian ambassador to france that, perhaps, this second crew member was alive and had been picked up and now we know that that is true. this has been specifically confirmed by the high russian leadership. the navigator is now safe and well at the russian air base in syria. it was a 12-hour search to find him. a search that both russian and

syrian special unit took part in. now we have the confirmation that he's alive we've been hearing some fairly belligerent language from the russian side over the last few hours. how much of that is for public consumption and how much is it expected that they're going to back that up? >> reporter: that's a big question, really. we have just heard from vladimir putin saying that the current turkish leadership is islam ising the country. they're angry about what happened on tuesday. there's some bad language from putin saying that he felt betrayed, this was a stab in the back. the russian position is that this plane was maybe getting - a kilometer to the syrian border.

it - turkish border. it didn't cross into turkish airspace. that is a line they are likely to maintain. what we are seeing at the moment is various steps to muscle up, i suppose, the russian defense minister has announced that s 400 air defense systems are going to be deployed to the air base that russia has in syria. this is the most advanced of the s 300 family of air defense systems. it doesn't look like much, a bench of big pipes on the back of a truck, but it is a very, very capable weapon and it has a range, depending on the missiles being used in it, a range of some 400 kilometres. that will improve russian air defense in syria live for us there in moscow. the latest on the nato reaction from brussels. >> reporter: there's an important exercise in damage mitigation.

on the one hand caw calling for calm and deescalation, for nations at an all time allow since crime last year, about on the other hand nato has been quick to rally to support turkey. during the course of the extraordinary north atlantic council meeting on tuesday, the turkish delegation presented its findings along with a video and some other data as to how and why the decision was made to shoot down the russian jet. according to the turkish verse of events, the jet was over turkish airspace at the time the decision was made and according to the turks a series of warnings were given to the pilot of that plane before the decision was finally made. that now, according to nato, is the shared position of all 28 members states. of course, nobody at the moment is interested in seeing this play out militarily, but we may well see in the coming days much

more assertive in turkey and russia. there may well be a war of word if nothing else, and at the end of that, of course, nato may end up playing a much more assertive role also on the dmaund commuter trains have run again and schools have reopened after a four day security alert in brussels. there was an imminent threat of attack similars to the paris atacts. many of the attackers had ties to brussels and the police suspect the mastermind may be hiding out in belgium. a suicide bomber is suspected of causing a bomb blast on a bus in tunisia. at least 12 people were killed. a state of emergency has been declared. they're at war with terrorists says the president. >> reporter: the remains of the presidential bus hit right in the heart of tunis. it was picking up officers at a

bus stop when the explosion happened. on one of the capital's main bona fided, it was-- street, it was bus. the loud was heard across the center. the president said he called it an act of terror and imposed a state of emergency. >> translation: after consulting with the prime minister and the head of parliament, i would like to declare an emergency extending for 30 days as per the law. secondly, there is a curfew imposed across the country starting from 9 this haven'ting until tomorrow morning at 5. -- evening >> reporter: the country is still recovering from two attacks on tourists this year. security forces were criticised then for not acting quickly. i.s.i.l. claimed responsibility for those attacks. according to the government there are around 3,000 tnisians fainting. there are groups in the country

linked to al-qaeda. security forces are given additional powers to make arrests and stops people from protesting. there was already additional security in major cities and strategic areas on the border, but they were unable to prevent this latest attack germany says it will send 650 additional sol skrers to mali to help with the peace keeping mission there. this comes after last week's attack in the capital of bamako where 19 people were killed by gunmen in a hotel. france have troops on the ground in mali to help its former colony to fight rebels. still ahead on the program. [ ♪ ] kenya keeps the faith as pope francis is said to land in africa for the first time in his

papacy. >> reporter: a century ago albert einstein began working on his theories on relativity, ideas that would profoundly shape the modern world. the only way to get better is to challenge yourself, and that's what we're doing at xfinity. we are challenging ourselves to improve every aspect of your experience. and this includes our commitment to being on time. every time. that's why if we're ever late for an appointment,

we'll credit your account $20. it's our promise to you. we're doing everything we can to give you the best experience possible. because we should fit into your life. not the other way around.

a reminder of the head labs of the russia has confirmed that a pilot from the plane drowned by turkey on tuesday is alive after being picked up by syrian army. the other pilot was shot and killed as he par chuted from the burning plane. russia is deploying an air

defense missile system in its base in syria and has warned turkey of serious consequences. the turkish president says he doesn't want the situation to escalate. turkey has defended its action because the jet entered its airspace but russia denies this. tunisia says that a suicide bomber blew himself up in the bus. 12 people were killed. the president has declared a state of emergency. back to our top story. turkey's downing of a russian creat. the u.s. presidential has taken this as an opportunity to reiterate his position on russian air strikes in syria. he says he is hoping this will push the u.s. to push the coalition. more. >> reporter: this was a meeting meant to send a message, the u.s. and france stand united in a fight against islamic state in iraq and the levant. we stand by our friends

>> reporter: the focus quickly shifted after a russian jet was shot down by turkey, the leaders focusing on their hope that this won't escap eight an already complicated conflict. turkey, like any country, has a right to defend its territory and its airspace. i think it's very important right now for us to make sure that both the russians and the turks are talking to each other, finding out exactly what happened >> reporter: they said will help push vladimir putin to their coalition which they said it would welcome as long as he stops supporting bashar al-assad and stops targeting the opposition forces that they support. even before the plane was drowned experts had been saying the u.s. had to do something to change russian thinking. an american demonstration of will and capability, both for the syrian government and for the russian government, i think it would be very helpful at this point, not because we want to

start russian pilots out of the sky, but we want to demonstrate that we have an ability to protect the people we work with and if the russians will attack them, there will be consequences for the russians which the russians won't like >> reporter: it remains to be seen if this will change russian strategy. but it became clear after this press conference their strategy isn't changing, only intensifying. >> translation: france will not intervene militarily on the ground. it is the local forces who will do so. >> reporter: some military experts say that will have a limited impact. to be really effective in air campaign, it needs something on the ground to use the hammer against and that's not obvious to me. >> reporter: the white house believes russia had been started to play a constructive role in the syrian conflict. the big worry after this is that will no longer be the case

shooting of another black teenager by a white policeman in the united states has provoked more protests and allegations of brutality. the officer has been charged with murder after opening fire 16 times in chicago. >> reporter: these are the final moments of 17-year-old's life. he was walking down the chicago street followed by a police. a vandalism suspect. he was armed with a small knife. an officer opposite fire and he falls to the ground. after that moment he was shot again and again for a total of 16 times. the release of these pictures was delayed for a month amid fears of a back lash. i understand that the people will be upset and will want to proceed when they-- froeft when they see this video. i would like to echo the comments of the mcdonald family. they have asked for calm and for those who choose to speak out, do it peacefully.

>> reporter: chicago policeman who shot the teenager has been charged with murder. he felt threatened. the officer was stripped of his police powers immediately. as we all know, today he was charged with first degree murder by the states attorney and as a result he has been put into what is known as i ano pay status >> reporter: hundreds of people came to the streets of chicago to protest against the killing, calling for at the end to the use of lethal force by the police, predominantly against black young men people have a right to be angry and to protest, to free speech, but they do not have a right to make criminal acts >> reporter: chicago police have paid millions of dollars in settlement and rap registrations for cases tied to police misconduct. the force offered to pay $5 million dollars to the mcdonald family before they even filed a case. i didn't not just chicago.

police using lethal force against black youth has come under scrutiny. this has continued for two days. here 24-year-old, another black man, was shot and killed by police. the officers involved have been sent on leave. clerk's family wants the video of the nent stow be released, but the authorities say the release would affect the ongoing investigation. relations in the united states are further strained. people now have another reason to renew calls for the review of the lethal force by the police live to manila where a fire in a residential area of the city has been raging. we understand thousands of people are - thousands of families have been evacuated as a result of this philippine air force have been involved in putting out the fire. that's all the information that we have on that right now.

we will, of course, bring you more as and when we get it. canada has announced details of its plan to resettle 25,000 syrian refugees, but there's public concern about security and health screening of those to be taken in. daniel lack reports from toronto >> reporter: a picture of 2-year-old allan dead on a peach in turkey focused canada's recent election campaign on syrian refugees. the new liberal government now says it promised to welcome 25,000 will be kept but it will take longer than originally pledged. the new plan involves army, all levels of government and community groups yes. we want to bring them fast, but we also want to do it right. i have heard canadians across this country saying yes, you have to do it right, and if it takes a little bit longer to do

it right, then take the extra time >> reporter: after the paris attacks, polls showed more public concern about women coming so many so quickly. there have been several racist incidents involving the muslim community. delaying means more time for checks. >> reporter: once security checks are done, government upon sored refugees will need troer housing and that means military par agos, disused public buildings, even mostly empty hospitals like this one. all will be safe homes for people from sir syria for several months at least. >> reporter: canada has a long traditional of accepting refugees. they will need funding but they are ready for the influx i think what is good for us is that we have a sophisticated service sector. we will need to build capacity, we need to ensure we have enough

interpreters, but we're feeling as if we're ready >> reporter: at toronto's cafe at least 12 syrians are working. he knows what goes on. i would like to help them. nobody helped me when i came to canada to start a new life. >> reporter: in the beginning it's very hard, but now we are happy that we are here safety, we start to work, my daughters go to school. so i hope that everybody can come here and have this chance >> reporter: syrians begin arriving on aircraft early next month under a system unique to canada, 40% of them will be sponsored by individual and community groups, the rest by government. this country is about to receive one of its biggest refugee intakes ever pope francis is on his way to kenya.

he is expected to give a message of reconciliation and unity on his first trip to africa as leader of the roman catholic church. reporting reporting. >> reporter: these castes licks - doctor catholics are waiting to meet their pope. we are often talking of inter religious dialogue and so when we see the holy father being able to kind of encounter the heads of all these other religions and denominations, i think for me it's something that is very powerful. >> reporter: the pope's visit comes as security forces across the continent grapple with violent groups carrying out attacks.

groups of carried out various places 148 people in a university were killed. they often appear to target non-muslims, but kennian must limbs have complained. even some of the utterances that have come after the attacks, they border very close to telling people now we cannot live together any more and as a country, a people at a we have no other place to go to. >> reporter: this is where the pope will celebrate his biggest gathering in the grounds of the university. an estimated 200,000 people are intended. there will be many on the streets watching on big screens. the pope will be talking about peace, acceptance and

reconciliation. from kenya pope francis to due to travel to uganda and end his trip in central african republic. there is concern about his safety. in particular, he came from the french authorities that we told him we cannot guarantee your safety. that means a lot and tells the pope, like, much as you preach the peace and love of god, there are things that will surely be out of our control >> reporter: throughout history, the pope is expected to talk about climate change, a subject he is passionate about. kenyans are keen to his his authorities on governance. many departments are full of corruption it's a hundred years to the day since albert einstein

revolutioned our understanding of light and time. he paved the way for satellites and smart phones. our correspondent in sitser land where-- switzerland. >> reporter: einstein's theory of general relative came after his e eau equals mc squared. it added the force of gravity to the equation and predicted how it can bend light and alter the passage of time. this has been widely observed by microscope. it revealed more than a quarter of the earth is made out of dark matter. it will not be enough to produce the distortion. you need extra mass that you cannot see. that mass is called dark matter and the analysis of dark matter comes because of einstein

predicted this effect. thanks to that effect we can quantify how much dark matter there is in the universe. >> reporter: whine stein's equations are the basis of global positioning technology, found in spart phones and used widely for alternative gags. the einstein museum houses other technologies he helped develop, including this compass, still used on ships. >> reporter: the equations presented by einstein in 1915 changed forever our understanding of the physical world, from the effect of gravity on light and the passing of time to the existence of black holes. it was also the beginning of a period that would see him become a super star, one of the most well-known thinkers of the 20th century. after initially supporting the development, einstein later campaigned against nuclear weapons. he was also a voc supporter of human and civil rights. those were topics which

really moved many people automatic over the world and he had credibility, he had the pop star looks, also his personality. i don't think that he intended to be a pop star, but he really fitted perfectly well into this need for a pot star. -- pop star >> reporter: his theories also had a philosophical side, one he often expressed in the tens of thousands of personal letters he wrote. everybody realised that the things we do, eh every single day are a permanent part of the universe from that moment on. i think maybe everybody would treat each other better and trying to make sure that they were making a mark on the universe that they were proud of. >> reporter: einstein also challenged those around him to try each day to cambrian the mysteries of eau torpidity life and of the structure of reality.

it is important never to stop questioning-- eternity and life as always, there is plenty more on our website, aljazeera.com. all the stories that we're following there. >> this is "techknow". a show about innovations that can change lives. >> the science of fighting a wildfire. >> we're going to explore the intersection of hardware and humanity, but we're doing it in a unique way. this is a show about science... >> oh! >> oh my god! >> by scientists. tonight... the digital divide. >> if you had the world's fastest internet, what would you do with it? >> the promise of the digital superhighway. lightning fast hook-ups to the web, but not for most of the