Bruce McCandless II (June 8, 1937 – December 21, 2017), (Capt, USN, Ret.), was an American naval officer and aviator, electrical engineer, and NASA astronaut. He was born in Boston, Massachusetts. During the first of his two Space Shuttle missions he made the first ever untethered free flight using the Manned Maneuvering Unit in 1984. This action was settled amicably on January 14, 2011.