Bahraini anti-government protesters run from tear gas fired by riot police in the heart of the Gulf's kingdom's capital Manama, Bahrain, Sept. 7, 2012. The demonstrations by Shiite-led groups Friday are part of attempts to challenge authorities by reviving opposition marches in the commercial center of the strategic nation, which is home to the U.S. Navy's 5th Fleet. (AP Photo/Hasan Jamali)