Article Photos: Source: Mexican teen killed by US BP agent 1/3

  In this photo taken Thursday, Aug. 9, 2012, A U.S. Border Patrol vehicle keeps watch along the border fence in Nogales, Ariz. A U.S. Border Patrol agent opened fire on a group of people throwing rocks from across the Mexican border, killing a teenage boy and eliciting outrage from the Mexican government over the use of lethal force, authorities said Thursday.(AP Photo/Ross D. Franklin)