NASA is the United States space agency that was founded in 1958. It is responsible for the country's civilian space program as well as aeronautics and space research. NASA has been involved in many important space exploration missions, including the Apollo Moon landing program, the Space Shuttle program, and the International Space Station. The agency is also responsible for developing new technology to be used in space exploration, such as the Mars rover Curiosity. NASA is an important part of the US government and plays a vital role in the country's space program.