40 years ago the first wireless spacewalk. NASA astronaut Bruce McCandless II, on board the tenth mission of the Space Shuttle Challenger, tested for the first time the'space armchair' Called Manned Maneuvering Unit, it allowed astronauts to move away from the shuttle independently, without those cables called 'umbilical cords' The MMU, equipped with 24 small rocket engines, was designed to allow astronauts to recover or repair satellites.
After the first test it was used in several missions, but the Challenger disaster which exploded in 1986 sent it into retirement.