A group of masked men run for cover after riot police launched tear gas in Caracas, Venezuela, Saturday, Feb. 22, 2014. After an opposition rally broke up in the late afternoon, in a pattern that has been seen in past demonstrations about 1,000 stragglers erected barricades of trash and other debris and threw rocks and bottles at police and National Guardsmen. The troops responded with volleys of tear gas to prevent the students from reaching a highway and blocking traffic. (AP Photo/Rodrigo Abd
