<human>:  When was the first manned space flight?
<bot>: The first manned space flight was the Soviet Union’s Vostok 1 in 1961. The Vostok 1 was a single-seat spacecraft that carried a single cosmonaut, Yuri Gagarin, into space. The Vostok 1 was the first manned spacecraft to orbit Earth, and the first manned spacecraft to return to Earth.