Photo of cosmonauts Klimuk and Sevastyanov USSR Space USSR. Pyotr Ilyich Klimuk Soviet cosmonaut, twice Hero of the Soviet Union (1973, 1975), Colonel General (1998). He made his first space flight from December 18 to 26, 1973, together with flight engineer V. Lebedev on the Soyuz-13 spacecraft. The flight duration was 7 days 20 hours 55 minutes 35 seconds. Before the flight, Yu. Romanenko was the youngest (by date of birth) of those who flew into space. Vitaly Ivanovich Sevastyanov – pilot-cosmonaut of the USSR, candidate of technical sciences. Twice Hero of the Soviet Union. Member of the CPSU since 1963.