An HH-60W Jolly Green II sits in a frozen chamber
An HH-60W Jolly Green II sits in a frozen chamber in the McKinley Climatic Lab, March 19, 2020, at Eglin Air Force Base, Fla. The Air Force’s newest combat search and rescue helicopter and crews experienced temperature extremes from 120 to minus 60 degrees Fahrenheit as well as torrential rain during the month-long testing period. The tests evaluate how the aircraft and its instrumentation, electronics and crew fare under the extreme conditions it will face during operations. (U.S. Air Force photo by Samuel King Jr.)
24.0-70.0 mm f/2.8
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