LANGLEY AIR FORCE BASE, Va. -- The 633d Civil Engineer Squadron Fire Department readies equipment before extinguishing a fire during a Toxic Industrial Chemical/Toxic Industrial Material simulation here, Feb. 4. The Major Accident Response Exercise is held semi-annually to evaluate first respnders' ability to quickly react and stabilize real-world emergencies. (U.S. Air Force photo/Staff Sgt. Ashley Hawkins)(RELEASED)