Jim Crocker, head of Civil Space at Lockheed Martin, moderates a panel discussion as part of an event celebrating the 25th Anniversary of the Hubble Space Telescope, Saturday, April 25, 2015 at the Smithsonian's Steven F. Udvar-Hazy Center in Chantilly, Va. Members of the panel were former NASA astronaut's Loren Shriver and Bruce McCandless, ESA (European Space Agency) astronaut Jean-Francois Clervoy, and former ESA astronaut Claude Nicollier.

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Keywords: ., 25th, anniversary, center, chantilly, crocker, hubble, jim, joel, kowsky, launch, nasa, rocket, space, steven, telescope, udvar-hazy, va