A U.S. military honor guard takes position to welcome Canadian Forces' Chief of the Defense Staff Gen. Thomas J. Lawson at National Defense University's Roosevelt Hall on Fort McNair, Washington, D.C., June 26, 2013. U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, and Lawson participated in the U.S. - Canada Defense Chiefs Strategy Dialogue. A U.S. military honor guard takes position to welcome Canadian Forces' Chief of the Defense Staff Gen. Thomas J. Lawson at National Defense University's Roosevelt Hall on Fort McNair, Washington, D.C., June 26, 2013. U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, and Lawson participated in the U.S. - Canada Defense Chiefs Strategy Dialogue. SHARE: Download: Full Size (1.97 MB) Tags: Photo Essays Credit: VIRIN: 199574-R-CSV82-117.jpg Photo Gallery