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Key Facts In This Video
On April 12, 1961, Soviet cosmonaut Yuri Alekseyevich Gagarin became the first human in space. 00:25
Rumors of "lost cosmonauts" that flew to space before Yuri Gagarin have been around since at least 1965. 01:27
The Soviet Union did, in fact, erase members of the Soviet space program from photographs. 03:06
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