11/24/2009 -  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)

11/24/2009 -  United Launch Alliance workers prepare to hoist 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)

11/24/2009 -  United Launch Alliance workers prepare to hoist 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. Mackely)

11/24/2009 -  United Launch Alliance workers hoist 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. Mackely)