Flightline Visit Defense Secretary Dr. Mark T. Esper talks with U.S. airmen during a visit to Prince Sultan Air Base in Al Kharj, Saudi Arabia, Oct. 22, 2019. SHARE IMAGE: Download Image: Full Size (3.32 MB) Tags: air force, defense secretary, esper Photo By: Army Staff Sgt. Brandy Nicole Mejia, DOD VIRIN: 191022-D-AP390-3212Y.JPG Photo Gallery