Yuri Was Flying At The Rocket "Vostok 3000" with 3 Other Russian Astronauts: Michael Cantmir, Valantine Colov (His Wife) And Alex Tumkin. These 3 Astronauts Died When Vostok 3000 Is Out Of Globe, Only Gagarin Is Survive. The Rocket Builded And Named By The Rocket Builder - Boris Vostok.