Esper Exercise Defense Secretary Mark T. Esper participates in a physical training session with service members and civilians at Camp Resolute Support in Kabul, Afghanistan, Oct. 21, 2019. SHARE: Download: Full Size (5.22 MB) Tags: defense secretary, esper Credit: Army Staff Sgt. Nicole Mejia, DOD VIRIN: 191020-D-AP390-3158.JPG Photo Gallery