Tensions Sour between Iran and the West

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Is the US hoping to overthrow the current leaders of Iran's Islamic Republic? If those leaders believe that, will they be more likely than ever to develop a nuclear bomb? Will tough talk in the presidential campaign convince them there's no other choice? Also, the video of US Marines urinating on dead Taliban fighters, and more on 200 pardons by Mississippi's outgoing Governor Haley Barbour. Does his explanation make sense in a state notorious for locking up suspects based on false evidence?

Banner image: Iranian security forces inspect the site where a magnetic bomb attached to a car by a motorcyclist exploded outside a university in Tehran on January 11, 2012, killing a scientist and injuring two other people, according to Iranian news agencies. Photo by Sajad Sfari/AFP/Getty Images