Staff Sgt. Erick Hall and Maj. Eric Alvarez check pre-flight

Staff Sgt. Erick Hall and Maj. Eric Alvarez check pre-flight oxygen equipment prior to a B-1B Lancer mission using a Scot Communications and Oxygen Tester at the 379th Air Expeditionary Wing in Southwest Asia, Aug. 19, 2013. Hall is the 379th Expeditionary Operations Support Squadron B-1B Lancer aircrew flight equipment NCO in charge and a Fort Worth, Texas, native. Alvarez is a 9th Expeditionary Bomb Squadron weapon systems officer and a New York City native. Both are deployed from Dyess Air Force Base, Texas. (U.S. Air Force photo/Senior Airman Bahja J. Jones)