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KENNEDY SPACE CENTER, FLA. -- Inside the mobile service tower on Launch Pad 17-B at Cape Canaveral Air Force Station, workers inside the mobile service tower on Launch Pad 17-B at Cape Canaveral Air Force Station erect a protective screen above the THEMIS spacecraft to preserve a clean-room environment. THEMIS consists of five identical probes, the largest number of scientific satellites ever launched into orbit aboard a single rocket. The THEMIS mission is to investigate what causes auroras in the Earth's atmosphere to dramatically change from slowly shimmering waves of light to wildly shif…
