U.S. Air Force Tech. Sgt. Douglas Caldwell, Okuma independent medical technician, prepares a water sample at Okuma's Surfside Restaurant on Okuma, Japan, Feb. 2, 2013. As one of his extra duties, Caldwell helps with all the bio-environmental work such as water sampling and checking for cleanliness at the local restaurants. (U.S. Air Force photo/Airman 1st Class Brooke P. Doyle)
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