Face of the force
Airman 1st Class William Stevens, 96th Security Forces Squadron, smiles as he peels off his M50 gas mask after the all clear is given during the chemical, biological, radiological, nuclear and explosive training exercise at Eglin Air Force Base, Fla., Feb. 1. The Airmen were taught the proper procedures during the week-long event before executing the tactics by themselves during the exercise. (U.S. Air Force photo/Samuel King Jr.)