"The Space Shuttle's First Flight: STS-1" "The Space Shuttle's First Flight: STS-1" "The Space Shuttle's First Flight: STS-1" http://history.nasa.gov/SP-4219/Chapter12.html "The Space Shuttle's First Flight: STS-1" "The Space Shuttle's First Flight: STS-1" http://history.nasa.gov/SP-4219/Chapter12.html The Space Shuttle's First Flight: STS-1 "lead center"