A Bahraini anti-government protester moves toward riot police with a chunk of concrete Sunday, April 22, 2012, during clashes in Bilad al-Qadeem, Bahrain, on the edge of the capital of Manama. Security forces in Bahrain set up checkpoints and stationed armored vehicles in anti-government strongholds Sunday to confront possible protests coinciding with the Gulf nation's Formula One Grand Prix. (AP Photo/Hasan Jamali)