U.S. Air Force Master Sgt. Justin Sims, Expeditionary Medical Group bioenvironmental engineering craftsman, oversees Senior Airman Kevin Thompson, 332d Expeditionary Civil Engineer Squadron force protection and public health journeyman, taking a water sample at an on-base coffee shop to test for acceptable ranges in pH and chlorine at an undisclosed location in Southwest Asia, May 11, 2022. (U.S. Air Force photo by Master Sgt. Christopher Parr)
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NIKKOR Z 24-70mm f/2.8 S
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