Eleven new astronaut candidates are joining the ranks of space explorers. NASA introduced the new class during a Space Day celebration today at the National Air and Space Museum’s Steven F. Udvar-Hazy Center in Chantilly, Va. The class of 2004 will be the first focused from the very beginning on realizing the new Vision for Space Exploration. NASA Administrator Sean O’Keefe called members of the new astronaut class, “our next generation of explorers, who’ll help blaze a galactic trail through the solar system.