  sts-4 was the fourth nasa space shuttle mission, and also the fourth for space shuttle columbia. the mission launched on june 27, 1982 and landed a week later on july 4. sts-4 was the final test flight for the shuttle; it was thereafter officially declared to be operational. columbia carried numerous scientific payloads during the mission, as well as military missile detection systems. ==crew==  sts-4, being the last test flight of the space shuttle, was also the last to carry a crew of two astronauts. commander ken mattingly had previously flown as command module pilot on apollo 16, and was also the original command module pilot for apollo 13 before being infamously replaced by his backup, jack swigert. mattingly was also instrumental in returning the apollo 13 crew safely back to earth after the accident that prevented them from landing on the moon. hartsfield was a rookie who had transferred to nasa in 1969 after the cancellation of the air force's manned orbiting laboratory program. he had previously served as a [[capsule 
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