In 2004,
Congress approved the
president’s Vision for Space Exploration, which included a renewed commitment to the manned space program, returning to the
Moon by 2020, and possibly on to Mars thereafter. The key component to making this plan affordable was retiring the aging space shuttle and replacing it with a new, safer
and less-expensive-to-operate system – the manned Orion Crew Exploration Vehicle
launched on the Ares crew launch vehicle
.
