In this preview from the new six part series When We Left Earth, astronauts Neil Armstrong, Buzz Aldrin, and Michael Collins prepare to board Apollo XI for their historical mission to the moon. Airing on consecutive Sundays, June 8, 15, and 27 at 9PM only on the Discovery Channel! For the first time ever, audiences will have the chance to check out mission and training footage completely restored and digitally remastered in HD. For more info, visit: http://dsc.discovery.com/tv/nasa/nasa.html