Stock Photo - Vance Coffman, CEO of Lockheed Martin, addresses the crowd gathered for Space Day activities at the National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Va. His words came shortly before the presentation of NASA's 2004 class of astronaut candidates. Renee Bouchard

Stock Photo: Vance Coffman, CEO of Lockheed Martin, addresses the crowd gathered for Space Day activities at the National Air and Space Museum's Steven F.

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