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giving the resources to survive. >> thousands of passengers suffer big delays after a computer failure froze airline travel. , still no the ukraine end to the fighting. worries aboutzon, the tribes future.

welcome to our viewers on public television in america and also around the globe. airspace closed, two words that strike fear into any traveler. it's what happened for a brief time today at heathrow and other u.k. airports. the result was chaos and long delays for many. a major computer failure was to blame. the issue had been resolved but the fallout continues. >> silence in the skies. late afternoon, it wasn't the normally noisy airspace with planes taking off and landing. it was virtually on shutdown. no planes taking off, very few allowed to land. cues,e the terminal

thousands affected by cancellations and delays, a computer failure at the national air traffic control center. they called it simply unacceptable as it caused chaos with passengers. this family's holiday is close to collapse with their flight canceled and frustration growing. >> my daughter is for, my son is two. there is no priority by the airline they have just canceled their flights. i am told i have to go and join a cue. >> others unable to make it away. just one of those situations where you pray it's not you and you hear about it but unfortunately, ours got canceled around 10 minutes before we got to the airport. >> the radar shows the situation.

,unched up with nowhere to go passenger stuck in the supply -- sky. the radar yesterday show the contrast in flights. passenger sending pictures from their delayed journeys as dozens are canceled on this busy pre-christmas friday. some managed to find the bright side. >> we are in good spirits. we have been given sandwiches and snacks from the airline. it would have to take a lot to dampen our spirits. >> this was southhampton as the hour.wn turns after an they are spreading across the country.

scottish airports not immune to the skies. flights are now coming in and out of heathrow. it has had a massive impact. delaysologized for the they say was caused by a technical fault. the situation is restoring itself to normal. we will work through the system. >> they will have to provide a full explanation for a failure that has left many heading on holiday stuck at the airport. >> i spoke with pilots and aviation experts. this is not the first time this is happened. as a pilot, do you have full

consequence with computerized air traffic control system. >> as well as the caulk hits of the aircraft, current aviation across the world is the safest it has been in history. so we have all the confidence. the radar as opposed to one that displays time, speed, location, etc.. even when there is an emergency such as this, there are well-established procedures. >> do you feel those systems are adequate? >> they are more than adequate. the aircraft knows its position. it knows its speed and it knows if there is traffic in the area. if an aircraft is in danger of coming into a position where it might collide with another

airliner. it has automatic resolution display. the pilots can take evasive action. there are standard procedures for the aircrew to follow. the route already established. >> we can see the chaos caused by what is described as a computer error. how vulnerable air traffic control is potentially to extremist or attackers? >> the air traffic control system here was not hacked as best as we know it today. all computerized systems run the risk of being hacked, and their security systems have to be updated at all times. even if the aircraft were to lose all contact with air traffic control. it radar contract, communications not lost today, there are specific procedures to

bring those planes down safely at their destinations. >> our skies are going to be much more crowded. his airline travel designed to cope with what we see? >> there are current studies underway and implementation as a result of those long-term studies with regard to new air traffic measures that will be able to handle increased flow. occurs, whereem do we put all of these aircraft on the ground? where are they going to land from? >> what about the tension making air traffic control efficient and making it secure? >> i think we can do both. i am both an investigator and a former commercial pilot and a computer software designer. i have insight into all three specialties. haveir traffic systems

never been hacked. it doesn't mean they could not be. but i have seen displays and notices from the aviation authorities around the world that are studying the potential of this problem and already implementing future solutions to avoid it. the government of ukraine says yesterday was the first day in the country's seven-month conflict that there were no civilian or military casualties. the impact has been devastating. families have been torn apart. >> winter is settling over the graves. three munchak -- months after a long-range shell killed them both. autumnre buried in the by their mother tatyana.

neighbors who watch them grow up. six and her brother 12. he was disabled and needed constant care. they were killed running from shell fire near their home. >> here where the children played, emptiness. investigated the deaths. they were devastated before in world war ii.

communism allf rivalries. >> both sides are preparing for battles. x the conflict is frozen -- >> the conflict is frozen and widespread. she is still being treated for her wounds and is deeply traumatized.

>> the pain of war cannot be counted in days, months, or years. but in the lost lifetimes of children. bbc news, eastern ukraine. family's anguish and no sign of the cease-fire even though there is meant to be one in eastern ukraine. the ugandan president has called on african nations to quit the

international criminal court which she says has been turned into a means of oppressing africa. they were put forward in motion about mass resignation. the authorities in sierra leone have banned all public celebrations of christmas and new year and effort to halt the spread of ebola. during theyed festive time will be sure people don't gather in the streets or other public places. pope francis has refused a private audience due to what the vatican describes as a delicate situation with china. and that's our series on the costs imposed by jihadist extra mr. romney world. take a closere look at the finances of these groups.

the issue of kidnapping for ransom is gaining international attention. for more, i spoke a brief time ago, the undersecretary of the treasury department. you described the islamic state is the wealthiest terrorist organization in the world. where is the cash coming from? principally for sources. the sale of oil on the black market. it is estimated isis sells 25,000 barrels of oil a day. bringing in anywhere from $1 million to $2 million daily. also, extortion payments imposed on the population. people living in the territories that are controlled by isis. very similar to what you see by a mafia like criminal organization.

third, payments for ransom. hostages. in $10 million to $20 million a year for hostage payment. artifacts artifacts, taken and stolen from syria, iraq, and sold on the black market. isis is bringing close to three quarters of $1 billion a year. >> the money coming from the sale of oil. have u.s. airstrikes curtailed the ability to sell oil? >> i think there has been some success and i think it has made it more difficult. at the same time, i think the middlemen are finding effective ways and ingenious ways to .muggle oil across into syria

using in iraq in the territories controlled by isis to provide the necessary energy needed. >> would you think officials are doing to try to keep the islamic state from getting all this money? >> the treasury department is struggling. it is difficult for them to identify the actual middlemen that are transporting the oil, selling the oil, manufacturing crude oil. having ahey're difficult time identifying those people. i think the progress for designation and blocking assets has been slow and coming. sanctioned for dealing with ins? >> i think that should be a target. if we are talking about $1 million to $2 million a day in

funds being generated from the illicit oil trade, those moneys are not being placed in a shoebox and hidden under a mattress. those moneys have to work their way into the financial system and that is through traditional banks. >> thank you for joining us. you're watching bbc world news america. the protests continue in america over the two grand jury decisions. we go to a california community where the cameras on cobb said been a practice for years. the dow jones industrial average has fallen 300 points today as a drop in oil prices continues. has seen therowth price of oil fall by over 40%. >> another day and another fall in the price of oil.

it is partly the story of weak demand and several major economies that have turned in disappointing performances. china is the second-biggest oil user so the slowdown there has been the factor. it's also about apple supply. producers met and decided against production cuts. big fire's another that's come back on the stage. the united states. relentlessly until the shale revolution a decade ago. now the u.s. is one of the biggest producers on the planet. >> it can go lower from current levels. it looks like a very oversupplied market. we are looking at a lot of additional supplies, coming online.

>> demand may take some time to respond. >> it is one of the triggers. we should start to see it quite cautious next year. people will be spending, buying vehicles, and that will feed through to better demand growth numbers. like more tough times for many oil-producing countries. >> two grand jury decisions to not prosecute white police officers in the deaths of unarmed black man have prompted across the u.s.. scheduledlly has been

for tomorrow in washington dc. president obama says he wants police to wear personal cameras, something cops in the city of california have been doing for years. >> an emergency call in california. he is responding to a car crash. his shoulder mounted camera is already rolling. >> what is that for? >> is a camera useful in this kind of situation? >> absolutely. later on down the line when he doesn't remember saying that, he can't say i never told the officer that. here's evidence showing exactly what you said. >> they've had body cameras for four years.

complaints against cops have been cut by 88%. being filmed changes the way both police and the public interact. officer in ferguson had had a video camera during wouldn'tent, we probably have the unrest we are having. video doesn't lie. it's pretty straightforward. commonplace by police and protesters in los angeles this week. not everyone believes that cameras are enough. >> we've had all this video and no indictments. if every police department in the u.s. was fitted with body cameras, what is there to say that that is going to help bring about a systematic change? >> systematic change was promised 20 years ago after this video of rodney king being theen in the acquittal of

officer involved sparked the l.a. riots. >> ineffective, unsafe, and unjust. the police department continues to change. it's a command level course on how to stop discrimination. >> people in every profession and every walk of life have biases that can impact on their perceptions and on their behavior. this training, we bring the knowledge and skills because it is particularly important. they have such power over people. they seem well-meaning steps to take it those on the streets of l.a. and across america see symptoms of ingrained racism. >> it is working the way it is

supposed to work. to keep minorities and poor people suppressed and keep those in power in power. >> there are people that hate you so watch how you talk, watch how you look and watch how you think. i have to really teach them in a way that's unfair. the views arrived in the civil rights movement and views that america must address. hails,to an artist that tried in the amazon. you're the borders of brazil and french guy on a. _-- gayana. and tribal artist, he talks about his fears and his culture dying out.

>> my mother named me after a hummingbird in the forest because she thought it was beat of all. -- beautiful. so she gave me this name. was an artist i until a white man told me that i was. the first sculptures i did were of animals. making sculptures about the stars. the biggest star is known as the seven stars. it's the star that governs all-stars.

it is capable of sheltering everyone. every star has a story. young people are not interested. they don't want to learn to become an artist. they are abandoning our indigenous culture. my knowledge has not been spread and so the seeds have not been planted. with me.has stayed that, one day, the indigenous will disappear from the map. when i die, who is going to teach the young? our language will disappear along with all that knowledge.

>> every star having a story, bringing today's show to a close. i'm laura trevelyan, thank you for watching. >> make sense of international news at bbc.com/news. >> funding of this presentation is made possible by the freeman foundation, newman's own foundation, giving all profits from newman's own to charity and pursuing the common good. .ovler foundation and mufg >> it's a global truth that we can do more if we work together. banking relationships and

everye supports nearly place across the globe. andess takes partnership only through discipline and trust can we create something greater than ourselves. mufg. we build relationships that build the world.

gwen: two big stories this week, we finally learn the details about a controversial cia torture report, and congress wrestles to a standstill over the federal budget but also about what it believes. tonight on "washington week." >> the cia's actions a decade ago are a stain on our value and on our history. our nation and, in particular this agency, did a lot of things right during this difficult time to keep this country strong and secure. gwen: torture, enhanced interrogation, harsh tactics, no matter what it's called, everyone now agrees it happened before and should not happen again. but that's where the agreement ends. >> i know from personal experience that the abuse of