Military tanks are seen on the road to the Pearl Roundabout in Manama February 17, 2011. Police in the Gulf island kingdom of Bahrain attacked demonstrators camped out in the capital on Thursday, killing three, in a move to stifle pro-democracy protests inspired by similar movements across the Middle East. REUTERS/Hamad I Mohammed (BAHRAIN - Tags: POLITICS CIVIL UNREST MILITARY IMAGES OF THE DAY)