Senior Airman Tamika Calhoun, 22nd Logistic Readiness Squadron material management journeyman, performs sight corrections to an M4 assault rifle March 18, 2013, McConnell Air Force Base, Kan. These corrections are important to maintain proper weapon operations and to ensure the safety of McConnell Airmen. (U.S. Air Force photo/Airman 1st Class Colby L. Hardin)
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