Authorities face tough territory in border probe - Article Photos 2/13

Hours after a U.S. Border Patrol agent was shot and killed, and another was shot and injured, Border Patrol agents stand in front of a Border Patrol vehicle in front of the U.S. Customs and Border Protection Brian A. Terry Border Patrol Station Tuesday, Oct. 2, 2012, in Bisbee, Ariz. The agent and a colleague were on patrol in the desert near Naco, Ariz., about 100 miles from Tucson, when shooting broke out shortly before 2 a.m., the Border Patrol said. The second agent was shot in the ankle and buttocks, and was airlifted to a hospital. (AP Photo/Ross D. Franklin)