Astronaut Mark Kelly retires from NASA, Navy

Mark Kelly (AP photo)

October 1, 2011 8:29:27 PM PDT
NASA astronaut and Navy Captain Mark Kelly is hanging up his wings.

He retired Saturday from the space agency and the military.

Kelly commanded the space shuttle Endeavour's final mission this summer.

His wife, Arizona Congresswoman Gabrielle Giffords, is recovering in houston from a gunshot wound she suffered in an attack in January.

The two are writing a memoir that is expected to be published next month.