Article Photos: WHY IT MATTERS: Issues at stake in election 31/31

  FILE - In this Sept. 1, 2012 file photo, Iranian President Mahmoud Ahmadinejad flashes a victory sign in Tehran, Iran. With the Iraq war over and Afghanistan winding down, Iran is the most likely place for a new U.S. military conflict. Despite unprecedented global sanctions, Iranâs nuclear program is advancing. The United States and other Western nations fear the Islamic republic is determined to develop nuclear weapons and fundamentally reshape the balance of power in the Middle East, while posing a grave threat to Israel. Iran insists its program is solely designed for peaceful energy and medical research purposes. (AP Photo/Vahid Salemi, File)