Korean army Lt. Gen Na Sang Woong, the commanding general for the Republic of Korea army visits with U.S. Army Gen. David G. Perkins, commander of U.S. Army Training and Doctrine Command, at Fort Eustis, Va., March 28, 2016. The visit helped Na gain an understanding of how TRADOC helps shape the future of the U. S. Army. (U.S. Army courtesy photo)