Esper Greeting Defense Secretary Dr. Mark T. Esper meets with airmen at Yokota Air Base, Japan during his trip to the Indo-Pacific region, Aug. 7, 2019. SHARE IMAGE: Download Image: Full Size (1.17 MB) Tags: Air Force, Indo-Pacific, Defense Secretary, Esper Photo By: Army Sgt. Amber I. Smith VIRIN: 190807-D-SV709-0856.JPG Photo Gallery