. >> and a delicate effort to save a piece of art history, a self portrait by leonardo da vinci. >>> and a live look at the world war ii memorial, for the serviceman that lost their lives in battles around the atlantic ocean. . and and >>> l.a. clippers owner donald sterling agreed to sell the team and dropping his $1 billion lawsuit against the n.b.a. former microsoft executive steven balmer is buying the clippers for $2 billion. the n.b.a. banned donald sterling for life in april after a leaked recording went public. >>> welcome back to al jazeera america. two former u.s. contractors set up a website encouraging whistleblowers to come forward and expose possible illegal government activity. the site follows edward snowden's revelations about the n.s.a.'s mass surveillance programme. >> reporter: they are former national security agency employees wanting to expose concerns about how the agency was working. when they did, the government was not happy. >> when we started to address all of the unconstitutional activity they were involved in, they sent the - eventually sent the federal

a famed drug by leonardo da vinci aged to the point of almost being unrecognizable. polish and italian researchers pinpointed a way to work out how long the artwork has. the science of saving art. >> reporter: this is the legion of honour in san francisco, a great museum, and it contains a conservation ad. paper is one of the best ways to understand the creative process of art. it's true in the case of leonardo da vinci who did 2,500 works on paper. paper yellows over time. it's because all paper has what is called chromoforce, atoms that ab sort of blue light and reflect more yellow waive lengths which is why it's yellow. modern paper is terrible, it's made out of wood pulp. back in da vinci's day, in the case of this artwork, it was head out of linen rags. i'm not going to draw a self portrait. if you imagine back then the contrast between the red chalk and the white of the papers, it made the work incredible. the yellowing of the paper reduced the contrast. it's more difficult to see what is on the paper. what the researchers accomplished is they are using a certa

and thinking about their work, their sculptures, before executing them in stone or canvas, and leonardo da vinciis one of the greatest users of this, he used paper and chalk. more recently, paper is made of wood pulp. and back then, it was made of linen rags, and it lasted a long time. but as you know, paper eventually yellows, and that process is caused by atoms in paper called chromo fores, and it turns yellow. the work in question is a great self portrait by da vince, and i'm going to draw you a self portrait of myself. i can't, i'm a terrible artist. but the idea is that when you put chalk on to paper, the contrast is what makes it so beautiful and as it yellows, the chalk is losing it's craft. it's -- contrast. and what they have done, detecting the number from the paper. the paper's ability to grow more and more yellow. they have precisely named that down using a certain kind of infrared light. but they're no closer to actually preserving the work or reversing the affects of the chromofours turning yellow. bleaching the works, that sort of works when you have black and white. but if you pu

but we were wondering if the next leonardo da vinci might be that kid with his hand up. >> i think his work is phenomenal. i would have him photograph my family. i would have him photograph anybody. >> reporter: meet steven paul. the 17-year-old with prematurely graying hair has a knack with a camera. nina atoll is his classmate and muse. >> she's just herself, and i really like that. ♪ >> reporter: steven was one of the winners at this year's scholastic art and writing awards at carnegie hall. it's like being declared a high school all-american for creativity. >> i can't believe they gave us the opportunity, especially to be surrounded by such famous clients like past winners. i mean -- it's breathtaking. >> reporter: past winners like robert redford, stephen king, and lena dunham from "girls" on hbo. >> i think that i may be the voice of my generation. >> reporter: some of the student art gets put on display like the pratt manhattan gallery. while that is impressive, the folks at colossal media had a different idea for steven's photograph. imagine seeing your picture reproduced on th

an italian road can really look like this when the steering is as precise as leonardo da vinci and the have the stopping power of sophia loren. how do you get all this past the highway patrol? build them a lamborghini. nearly every model from every era filled the piazzas to be blessed, fussed over, photographed and admired as part of the national heritage. no two alike, each crafted as a matter of taste. even this was an offer lamborghini couldn't refuse. ( horn playing theme to "the godfather" ) the rally ended with a coming out party for a new car named for a bull that murdered a matador. lamborghini built only four venenos, one for itself and three that sold for $4 million each. who buys that?! >> lock: very few people. and the most difficult thing to manage in the process of selling those cars was having a palatable story for the six or seven who we couldn't get a car for. >> pelley: you had to tell them why they couldn't buy a $4 million car. >> lock: i had to explain that we had a very limited production available on these cars. >> pelley: how many of the three veneno buyers boug

the history of sky diving dates back to 1485 when leonardo da vinci sketched the first blueprints forhundreds of thousands of people jump from high places and planes every year, deploying parachutes to bring them safely back to earth. according to the united states parachute association, the likelihood of a fatal crash is roughly 1 in 140,000. and the sky diver you're about to see escapes that fate by the skin of his teeth. an experienced sky diver is sailing down to earth at 45 miles per hour. like he's done more than 300 times before. but this time, something goes horribly wrong. >> are you okay? >> i've been in other situations where i've got out of them. this one here where the winds happened to catch me at the wrong time. i had to make some really fast decisions. and obviously, it didn't pan out the way i wanted it to. i was hoping to miss it, but i didn't miss the trailer. >> april 30, 2011. high above colorado's fremont county airport sky diving instructor tommy ferguson is preparing for his third and final jump of the day. >> i had already put out two loads of students. the da

. >> it's a universal dream that goes way back in history, like leonardo da vinci also tried to designluoresce creates an alter ego that was brought to life with the help of social media. >> we created facebook page and twitter and created the whole back story, basically. >> floris group also takes his viewers through every step of his adventure. >> hey, i'm yarno, and i'm on my blog and going to share my personal diy project. >> we started writing a script and trying to roll out all the different videos. >> this dream i have is about being able to fly in the same way as birds do with flapping wings. >> we basically used the same techniques you would use for film or any form of drama to establish a real character that has, you know, problems and struggles. >> where do you find a place in the big city nowadays with enough space for building 12 meters of wings? >> we didn't have money to buy attention, so we really needed to be patient and to have a kind of confidence that the story was interesting enough. >> the team adds credibility to the story by interviewing an actual professor of n