"SP-4402 Origins of NASA Names" "Origin of NASA's Names: Manned Spaceflight" "Origin of NASA's Names: Manned Spaceflight" "Origin of NASA's Names: Manned Spaceflight" "chapter 4" "SP-4402 Origins of NASA Names" "SP-4402 Origins of NASA Names" "Origin of NASA's Names: Manned Spaceflight" Gemini. NASA missions "chapter 4" http://history.nasa.gov/SP-4402/ch4.htm NASA publicly announced “Project Apollo” "SP-4402 Origins of NASA Names" "Origin of NASA's Names: Manned Spaceflight" "Origin of NASA's Names: Manned Spaceflight"