Bahraini anti-government protesters, some holding petrol bombs, remove a palm tree trunk being used as a roadblock in Malkiya, Bahrain, on Sunday, Oct. 28, 2012, to allow the passing of a march calling for freedom for political prisoners and in remembrance of those killed from Bahrain's western villages. The protesters replaced the trunk after marchers passed to slow any police vehicles that might arrive to disperse the gathering. Clashes erupted toward the end of the march between youths throwing petrol bombs and riot police firing tear gas. (AP Photo/Hasan Jamali)