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January 4, 2013
With the sliding door covering its 2.5-meter infrared telescope open, NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) 747SP rolls down the runway after landing at Air Force Plant 42 in Palmdale, Calif., following a more than four-hour test flight April 14, 2010. April 14, 2010 NASA Photo / Tony Landis