Capt. W. D. Smith of Greenville, S.C., Camp Blanding Chemical Warfare Service officer, trains in the use of the gas mask in Camp Blanding, Florida on August 19, 1942. Just to be sure that his office force could work under any conditions, he issued instructions that for an hour each day all work be done in gas masks to prove that conversations, even on the telephone and in dictation, could be carried on and other work done efficiently. (Photo by AP Photo)
