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Associated Press
In a photo provided by NASA the launch pad tower at SLC-3 is rolled back to reveal the United Launch Alliance  Atlas-V rocket with the Landsat Data Continuity Mission   spacecraft onboard on Monday, Feb. 11, 2013 at Vandenberg Air Force Base, Calif.  The Landsat Data Continuity Mission  mission is a collaboration between NASA and the U.S. Geological Survey that will continue the Landsat Program's 40-year data record of monitoring the Earth's landscapes from space. The spacecraft is scheduled to launch later today. (AP Photo/NASA,Bill Ingalls)

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