First Untethered, Free Flight, Bruce McCandless II, Naval Aviator

McCandless was one of the 19 astronauts selected by NASA in April 1966. He was a member of the astronaut support crew for the Apollo 14 mission, served as CAPCOM during the Apollo 11 mission when Neil Armstrong first set his foot on the moon (during the EVA), and was backup pilot for the first manned Skylab mission (SL-1/SL-2). He was a co-investigator on the M-509 astronaut maneuvering unit experiment which was flown in the Skylab Program, and collaborated on the development of the Manned Maneuvering Unit (MMU) used during Shuttle EVAs.
He was responsible for crew inputs to the development of hardware and procedures for the Inertial Upper Stage (IUS), Space Telescope, the Solar Maximum Repair Mission, and the Space Station Program.
McCandless logged over 312 hours in space, including four hours of MMU flight time. He flew as a mission specialist on STS-41-B and STS-31.