Secretary Hagel escorts Secretary-General of the United Nations Ban Ki-moon through an honor cordon and into the Pentagon Secretary of Defense Chuck Hagel, left, escorts Secretary-General of the United Nations Ban Ki-moon through an honor cordon and into the Pentagon in Arlington, Va., on April 18, 2013. Hagel, Ban and their senior advisers will meet to discuss international security issues. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 657715-P-HTM20-674.jpg Photo Gallery