Astronaut Jonny Kim leaves NASA, will return to active military duty

A man smiles and waves to a camera in a crowded laboratory full of wires and computer monitors.

Jonny Kim is leaving NASA to continue his military career.

The 42-year-old astronaut, who has one of the most jaw-dropping resumes of any person alive, is departing today (Aug. 27) after nine years with the agency. He has one mission under his belt, a long-duration flight to the International Space Station (ISS).