Gulf squeeze on dissent raises alarm with allies - Article Photos 2/7

Riot police stop and check vehicles in Daih, Bahrain, on Saturday, Nov. 3, 2012, where Bahraini anti-government protesters tried to organize a march despite a government ban on protests. A heavy police presence prevented protesters from gathering, and police chased and used tear gas to disperse small groups as they emerged. (AP Photo/Hasan Jamali)