DEFENSE LEADERS U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, meets with Brazilian Defense Minister Antonio Celso Amorim in Brasilia, Brazil, March 29, 2012. The two leaders discussed Brazil's political, economic and social conditions and its relationship with the United States. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 587464-N-URD97-813.jpg Photo Gallery