NACA Muroc Flight Test Unit XS-1 Team members and USAF Pilots. 1948. From left to right: Joseph Vensel, Head of Operations; Gerald Truszynski, Head of Instrumentation; Captain Charles Chuck Yeager, USAF pilot; Walter Williams, Head of the Unit; Major Jack Ridley, USAF pilot; and De E. Beeler, Head of Engineers.

Credits - NASA