The U.S.-backed monarchy in Bahrain imposed a heavy security presence in the capital city of Manama to deter protesters marking the first anniversary of the start of pro-democracy protests. Armored vehicles patrolled Manama as state forces fired tear gas at a group of activists gathered at the Pearl Roundabout, the focal point of opposition demonstrations. A number of people were arrested, including six U.S. citizens with the group Witness Bahrain who have come to monitor the crackdown. All six will be deported. Their expulsions follow the deportations of another two U.S. activists from Bahrain earlier this week.