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Heavy lifting
VANDENBERG AIR FORCE BASE, Calif. -- United Launch Alliance workers position a Wide-field Infrared Survey Explorer satellite for emplacement onto an ULA Delta II rocket. The satellite will observe the entire sky in mid-infrared wavelengths with greater sensitivity than ever before. The rocket is scheduled to launch from Vandenberg's Space Launch Complex-2 on Dec. 9. (U.S. Air Force photo/Mark P. Mackley)

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