-- according to arstechnica: "The leak appears to have originated in an external cooling loop located at the aft end of the Soyuz MS-22 spacecraft. Public affa

-- according to arstechnica: "The leak appears to have originated in an external cooling loop located at the aft end of the Soyuz MS-22 spacecraft. Public affairs officer Rob Navias, who was commentating on the spacewalk for NASA Television, characterized the spacecraft as leaking "fairly substantially." Video of the leak showed particles streaming continuously from the Soyuz, a rather remarkable sight. This was likely ammonia, which is used as a spacecraft coolant, although Russian officials have not confirmed this." --