Bruce McCandless II was a U.S. naval officer and aviator, electrical engineer, and NASA astronaut. In 1984, during the first of his two Space Shuttle missions, he made the first untethered free flight by using the Manned Maneuvering Unit.
STS-41-B was the tenth Space Shuttle mission and the fourth of the Space Shuttle Challenger. It deployed 2 communication satellites and inluded the first untethered spacewalk. It was also the first shuttle mission to land at Kennedy Space Center.Low Earth Orbit
The National Aeronautics and Space Administration is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research. NASA have many launch facilities but most are inactive. The most commonly used pad will be LC-39B at Kennedy Space Center in Florida.