The launch of a Soyuz spacecraft to bring Russian cosmonauts Sergei Prokopyev, Dmitry Petelin, and NASA astronaut Frank Rubio back to Earth from the International Space Station (ISS) has been postponed from February 20 until early March, said Yury Borisov, chief of Russia's Roskosmos space agency. Borisov said on February 13 that the exact date of the launch will be clear after a coolant leak registered over the weekend on the Progress MS-21 cargo spacecraft, currently docked at the ISS, is located and its cause is determined.
