Tensions high, U.S. warns Iran not to block shipping - Article Photos 2/5

Iran's President Mahmoud Ahmadinejad waves to reporters from his air plane at an air base as he departs Quito, Ecuador, Friday Jan. 13, 2012. Ecuador was the final stop in his four-nation Latin America visit. (AP Photo/Dolores Ochoa) ORG XMIT: DOR103