Airborne Meeting Defense Secretary Dr. Mark T. Esper speaks to reporters aboard an E-4B Advanced Airborne Command Post aircraft over the Pacific Ocean, Aug. 6, 2019. SHARE IMAGE: Download Image: Full Size (1.4 MB) Tags: Esper Photo By: Army Sgt. Amber I. Smith, DOD VIRIN: 190806-D-SV709-0181C.JPG Photo Gallery