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CAPE CANAVERAL, Fla. -- At Astrotech in Titusville, Fla., technicians ensure the payload transportation canister is properly placed to lower over the GLAST spacecraft. After installation, the spacecraft will be moved to pad 17-B at Cape Canaveral Air Force Station. At the pad, NASA's Gamma-Ray Large Area Space Telescope will be lifted into the mobile service tower and encapsulated in the fairing for launch. GLAST is a powerful space observatory that will explore the Universe's ultimate frontier, where nature harnesses forces and energies far beyond anything possible on Earth; probe some of science's deepest questions, such as what our Universe is made of, and search for new laws of physics; explain how black holes accelerate jets of material to nearly light speed; and help crack the mystery of stupendously powerful explosions known as gamma-ray bursts. The launch date is targeted no earlier than June 3. Photo credit: NASA/Kim Shiflett