An Edwards B-1B sits on the 80-foot turntable in the Benefield Anechoic Facility July 27, 2016, after being towed inside. The chamber is filled with polyurethane and polyethylene pyramids designed to stop reflections of electromagnetic waves. The size of the pyramids, which are painted dark blue or black, varies depending on the particular frequency and test procedure being conducted. Aircraft systems can be tested and verified that they work properly prior to actual flight test. (U.S. Air Force photo by Christopher Okula)