DEFENSE LEADERS U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, talks to Chilean Army Lt. Gen. Alfredo Ewing, director of the National Defense Staff, in Santiago, Chile, March 3, 2009. The chairman visited the country to meet with senior Chilean officials and speak at the Chilean Army War College. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 590640-V-QGD69-448.jpg Photo Gallery