This two-person International Space Station crew launch suffered a rocket failure at booster separation. The Soyuz's abort system activated within milliseconds, pulled the crew away from the failing rocket, and parachuted them safely to the ground where they were picked up and reunited with their families. It is the only In-Flight Abort for an International Space Station crew mission in the program's history. The two crewmembers on this aborted mission went on to fly to the ISS six months later on Soyuz MS-12. Internationally, this flight is not recognized as a true spaceflight as it reached only 93 km, just short of the Kármán line, the 100 km internationally recognized boundary to space. However, since a U.S. astronaut was onboard and NASA marks the boundary of space at 80 km, this counts as a spaceflight to NASA but not to Russia.