Oxygen sensors and other instrumentation are installed on a Boeing B-17 "Flying Fortress" bomber Monday, May 5, 2014, as it flies near Seattle. The recreated model of the "Memphis Belle" World War II airplane will be available for paid rides and donation-based ground tours on May 10-11, 2014 at the Renton Municipal Airport in Renton, Wash. (AP Photo/Ted S. Warren)
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