Sergey Volkov
On May 27, 2009, Romanenko was launched into space as the commander of the Soyuz TMA-15 spacecraft from Site 1/5 at the Baikonur Cosmodrome in Kazakhstan. He was part of the Expedition 20 and Expedition 21 crews and was the third second-generation space traveller after Sergey Volkov and Richard Garriott. Romanenko served as a Flight Engineer aboard the ISS during the two long duration missions.