From left, U.S. Air Force Senior Airman Vicky Santos, 379th Expeditionary Medical Group, explains the duties of the hospital's laboratory to U.S. Air Force Chief Master Sgt. Robery Sealey, U.S. Air Forces Central Command command chief, Jan. 18, 2012, at an undisclosed location in Southwest Asia. Santos, a native of San Francisco, Calif., is currently deployed from the 633rd Medical Support Squadron, Joint Base Langley-Eustis, Va.