Swearing In Defense Secretary Mark T. Esper swears in Army Secretary Ryan D. McCarthy on the steps of the Pentagon, Oct. 10, 2019. SHARE IMAGE: Download Image: Small (501.76 KB)| Medium (1525.76 KB)| Full Size (3.48 MB) Photo By: Army Staff Sgt. Nicole Mejia, DOD VIRIN: 191010-D-AP390-2003.JPG Photo Gallery