Pentagon Welcome Acting Defense Secretary Patrick M. Shanahan walks with South Korean Defense Minister Jeong Kyeong-doo into the Pentagon, April 1, 2019. SHARE IMAGE: Download Image: Full Size (1.47 MB) Tags: Shanahan, Acting Defense Secretary Photo By: Air Force Master Sgt. Angelita M. Lawrence, DOD VIRIN: 190329-D-HA938-0009Y.JPG Photo Gallery