U.S. Air Force Staff Sgt. Gregory Baxter, 633rd Air Base Wing Judge Advocate General paralegal, prepares for simulated missile impact during the phase II operational readiness exercise at Langley Air Force Base, Va., Feb. 15, 2012. Airmen wear the gas mask during a phase II ORE to prepare for potential chemical attacks. (U.S. Air Force photo by Airman 1st Class Teresa Cleveland/Released)