Kutub

[subtitle available] The story of how Richard Feynman, one of America's most famous scientists, helped to discover the cause of a tragedy. When the space shuttle Challenger blew up in 1986, it was the most shocking event in the history of spaceflight. The deaths of seven astronauts, including the first teacher in space Christa McAuliffe, were watched live on television by millions of viewers. But what was more shocking was that the cause of the disaster might never be uncovered.