 The Orion CEV became part of NASA's Constellation Program to send human explorers back to the Moon, and then onward to Mars and other destinations in the Solar System.After Constellation was cancelled, it was envisioned for emergency evacuation of the International Space Station, then retained for revived Solar System exploration plans.The concept for the vehicle was officially announced in a speech given by George W. Bush at NASA Headquarters on January 14, 2004.