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From left to right: Lt. Col. Shannon DaSilva, 2nd Space Warning Squadron commander, shares words with Lt. Col. April Wimmer, 2nd SWS parting commander, after their change of command ceremony May 11, 2017. At Buckley Air Force Base, Colo. Shannon is now responsible for the primary operations unit within the 460th OG, which continues to operate a more than 40-year-old, $3.2 billion on-orbit Defense Support Program satellite constellation. (U.S. Air Force photo by Airman 1st Class Holden S. Faul/Released)
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