Seven selected for Project Mercury went on to blaze bold paths in space exploration.
Crucial, complex safety system will rocket astronauts to safety at the first sign of danger.
Mission that began in 2009 recently published research that adds to the understanding of water on the Moon.
Mission validates the critical link to landing humans on the Moon and bringing them home safely.
New capsule will be capable of carrying U.S. astronauts to the International Space Station.