The NASA Space Flight Medal is a decoration of the National Aeronautics and Space Administration. According to its statutes, it is awarded "for significant achievement or service during individual participation as a civilian or military astronaut, pilot, mission specialist, payload specialist, or other space flight participant in a space flight mission." In practice, the medal is bestowed upon any astronaut (US or foreign) who flies aboard a United States space mission, and typically every subsequent flight is honored with an additional award.