DEFENSE TALKS U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, far right center, and Thomas A. Shannon, U.S. Ambassador to Brazil, far right, have a meeting with Army Gen. Jose Carlos de Nardi, Brazilian chief of defense, far left center, and Antonio Celso Amorim, Brazilian defense minister, far left, to discuss their bi-lateral partnership, and Brazil's role in South America as an emerging leader in Brasilia, Brazil, March 29, 2012. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 070600-V-BKR27-395.jpg Photo Gallery