U.S. Air Force Staff Sgt. Cristina Sullivan, 633rd Force Support Squadron Back 2 Basics lead instructor, works with individuals during a B2B class at Langley Air Force Base, Va., Jan. 8, 2015. B2B is a fitness improvement program aimed at assisting Airmen with 80% or lower on their Air Force physical fitness assessments. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)
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