Air Force Senior Airman Rony Castañeda-Zamora, a Merced, Calif. native, aerospace medical technician attached to the 51st Transportation Company, 77th Combat Sustainment Support Battalion, 10th Sustainment Brigade, explains, in detail, how to properly use every piece of medical equipment inside a combat lifesaver bag while conducting a CLS refresher course for the 51st TC convoy escort team at Bagram Air Field, Afghanistan, Feb. 28. The refresher course was split up into two segments, a classroom portion and hands-on training, which consisted of multiple simulated casualty scenarios. www.facebook.com/10thSustainmentBrigade (Photo by Sgt. Michael K. Selvage 10th Sustainment Brigade Public Affairs NCO)