At Astrotech in Titusville, Fla., the payload transportation canister is lifted so it can be installed over the GLAST spacecraft, behind it. 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