The Space Race was a competition between the USA and the USSR to explore space using artificial satellites and manned spacecraft. It can be seen as a part of the larger arms race, as developments in space research could easily be transferred to military research. Both countries started work on developing reconnaissance satellites well before the height of the Space Race. The Vostok spacecraft used by the USSR to put Yuri Gagarin into space, for example, was developed from the Zenit spy satellites used by the Soviet military. Narrated by David Hartman. Length 5:00.