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A U.S. Air Force F-35A Lightning II aircraft assigned to Hill Air Force Base, Utah, prepares to be refueled by a 459th Air Refueling Wing KC-135 Stratotanker during a flight to Graf Ignatievo Air Base, Bulgaria, April 28, 2017. Eight F-35s deployed to RAF Lakenheath, England on April 15 and two forward deployed to Bulgaria for a brief time which allowed the F-35s to engage in familiarization training within the European theater while reassuring allies and partners of U.S. dedication to the enduring peace and stability of the region. The F-35s are assigned to the 34th Fighter Squadron and are supported by total force Airmen from the 388th Fighter Wing, and the Air Force Reserve’s 466th Fighter Squadron, 419th Fighter Wing, Hill Air Force Base, Utah.(U.S. Air Force photo by Staff Sgt. Kate Thornton)

Artist illustration of the X-59 in flight in blue skies and white clouds.

X-59X59QuesstQuiet SuperSonic TechnologysupersonicsupersonicsLow Boom Flight DemonstrationLow-Boom Flight Demonstratorlow boomLow-BoomAeronauticsX-59 artist conceptX-59 artist illustrationLBFD