3, 2, 1, Lift-off! This six-part series chronicles the inside story of NASA's most epic endeavors. In "Ordinary Supermen" NASA and America's first astronauts, the Mercury Seven, are on a journey into the unknown. "Friends and Rivals" recounts the story of the nine astronauts on the Gemini mission, which rehearsed procedures important to future launches. "Landing the Eagle" details the Apollo program, the Apollo 1 disaster, the flights of Apollo 8, 9, and 10, and the tense lunar descent of Apollo 11. "The Explorers" features five successful moon landings - Apollo missions 12, 14, 15, 16, and 17, the 'successful failure' of Apollo 13, and Skylab. "The Shuttle" looks at that program, including the maiden voyage, the Challenger disaster, and the launch of the Hubble Space Telescope. "A Home In Space" centers on repairing the Hubble Space Telescope, construction of the International Space Station, and the Columbia re-entry disaster of 2003. Told by the astronauts and engineers who were there, this series celebrates NASA's triumphs and tragedies, and the history of American space exploration.