radar absorbed material, and a carbon graphite used for reinforcement. knocked said anything about that to you. >> no, no. >> you got a letter? >> i got a letter from a gentleman who was retired but worked on the project the stealth project. >> in this letter he talked about his own experience working on the development of the plane. >> correct. and having to be under full protective hazmat suit, full respirator any time anybody worked around the project. >> he can't help but wonder if his exposure caused t after reading the articles, he asked the air force for regular medical evaluations but was denied. to this day the air force hasn't been forthcoming about the health effects of the burning wreckage. he believes that lack of transparency is a lesson and warning for the rest denies of burlington. the air force is developing the operational playbook for the plane, not just how to fly the plane under certain circumstances. >> but is the community writing a playbook as regards to hazards and risks of bringing this plane in. >> where would you base a fighte

physicist working with him in a space underneath university of chicago stadium assembled a large pile of graphite blocks with lumps of natural uranium in it. in december 1942, he succeeded in bringing about the first man-made controlled nuclear chain reaction. havehat controlled fision been accomplished, it could be studied. robert hoffenheim are was a respected theoretical physicist in 1942. he had been closely examining the development of fision science. he was at the university of chicago when growth came through on his first inspection tour. groves, hetions with discussed the need for a central facility and other details. grow saw something in him, in leadership, and it understanding of what was needed to be done. >> when i became a graduate student at berkeley, his aptitude for brilliant and clear explanation was very strong. and easily able to crush a question or objection. >> hoffenheim are was a difficult human being. he was extremely intelligent. extremely quick. everything when i had just reached of what was being talked about. >>> groves -- >> gross selected him -- groves selected him

they are planning to invite international graphite aartists to paint here and share designs.ream to make the city the graffiti capital of the world. there's no guarantee of safety for those that make these walls beautiful. >>> sport. >> absolutely. spain has become the first country to have five teams in the u.e.f.a. champion's league group stage in the same season. that's after 2-time runner-up valencia scrapes through a tie. going through 4-3 on aggregate. >> translation: there was a spontaneous celebration with a collective selfie, we were together. knighted and happy. now there is a new project. and we go one step forward towards this project. this togetherness makes us competitive. the players are all in this together. dedicated and devoted. >> joining valencia in the group stages is barcelona, real madrid, atletico and sevilla. it is dickated how many places a country gets dependent on success. spanish teams won the last 7, barca the current champion. england had one winner, chelsea, in that period, despite the fact that english premier league tv revenue alone is $197 m

physicist,nd italian working underneath chicago stadium, assembled a large pile of graphite blocks with natural uranium in them. in 1942, they succeeded in bringing about the first man-made controlled nuclear chain reaction. now that controlled fission had been accomplished, it could be studied and the next steps could proceed. robert oppenheimer was a highly respected 38 year old theoretical physicist in 1942. he had been closely examining the development of fission science. in october, he was at the university of chicago when grove came through on his first inspection tour. they discussed the need for a central facility. grove saw something in oppenheimer, a leadership, and an understanding of what needed to be done. >> i first met oppenheimer when i became a graduate student at berkeley. his reputation for clear explication was already strong. he had a reputation for being very quick, and easily able to quash a questioner or objectioner. dr. bethe: oppenheimer was a difficult human being. extremely intelligent, extremely quick. he understood everything when i had just a glimpse of wh