COLLEGE SPEECH U.S. Defense Secretary Leon E. Panetta speaks to students at Brazil’s Superior War College in Rio de Janeiro, April 25, 2012. Panetta is on a five-day trip to the region to meet with counterparts and military officials in Colombia, Brazil and Chile to discuss an expansion of defense and security cooperation. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 052614-D-IOS23-293.jpg Photo Gallery