Cold soak
A Boeing 787 Dreamliner “soaks” in -45 degree temperatures inside the McKinley Climatic Lab April 21 at Eglin Air Force Base, Fla. The new aircraft is being tested in extreme heat and cold for two weeks prior to its release at the end of year. The Climatic Lab, which began testing in 1947, is the largest climate testing facility in the world. (U.S. Air Force photo/Samuel King Jr.)
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