From the early quest of the Mercury program to put a man in space, to the historic moon landings, through the Soyuz link up, and the first un-tethered space walk by Bruce McCandless, When We Left the Earth is the incredible story of humankind's greatest adventures, as they happened, told by the people who were there. Featured in the series is never-before-seen footage from NASA's secret film vaults, digitally remastered into stunning quality.