U.S. Public Health Service Rear Adm. Scott Giberson, U.S. Public Health Services acting deputy surgeon general, meets with U.S. Air Force Brig. Gen. Sean Lee Murphy, Air Combat Command surgeon general, during a briefing at Langley Air Force Base, Va., Sept. 22, 2014. Giberson and other members of the USPHS visited Langley to tour the Air Force’s Expeditionary Medical Support System. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)