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KENNEDY SPACE CENTER, FLA. -- In the Astrotech payload processing facility, General Dynamics technicians secure NASA's Gamma-Ray Large Area Space Telescope, or GLAST, onto a work stand. There GLAST will undergo a complete checkout of the scientific instruments aboard. The telescope will launch aboard a Delta II rocket May 16 from Launch Pad 17-B on Cape Canaveral Air Force Station. A powerful space observatory, the GLAST will explore the most extreme environments in the universe, and answer questions about supermassive black hole systems, pulsars and the origin of cosmic rays. It also will study the mystery of powerful explosions known as gamma-ray bursts. Photo credit: NASA/Kim Shiflett