Jaap van ‘t Hof (left), with the Netherlands TNO Laboratory; Alan Wall, with the U.S. Air Force Research Laboratory; Maj. Arthur L. Driesen, with the Royal Netherlands Air Force; Richard McKinley, with the U.S. Air Force Research Laboratory (now retired); and Theo van Veen, with the Netherlands Aerospace Centre, stand in front of the F-35 used during an acoustics testing session, led by experts in AFRL’s 711th Human Performance Wing. (Photo courtesy of Royal Netherlands Air Force)