视频简介
In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris and there is an increasing problem of satellites mysteriously breaking down. With first-hand accounts from astronauts and experts, Horizon reveals the scale of the problem of space junk. Our planet is surrounded by hundreds of millions of pieces of junk moving at 17,000 miles...。Adaptation of controversial real-life story from the 1950s. In 1953, five young men crossed the border from Czechoslovakia to East Germ any. They went to deliver a secret message from a Czechoslovak general to the US authorities, and they planned to join the US Army Special Forces in order to return and liberate Czechoslovakia. The three-day operation turned into “the largest m...。