In February of 1962, the United States put John Glenn into orbit. This prompted Soviet leadership to suddenly asked Chief Designer Korolev to launch the next space spectacular promptly. To make this mission truly spectacular the Soviets decided to launch a group flight of two Vostoks lasting up to four days in orbit.
Vostok 4 on Pad
Popovich in Orbit
Nikolaev & Popovich
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For the Soviet Union, 1960 was a mixed bag of success and failure as it struggled for new achievements in space exploration. The main driving force was to be the first nation to launch a man into space. An achievement their adversary, the United States, also desperately wanted.