Article Photos: Authorities face tough territory in border probe 11/13

  U.S. Border Patrol vehicles parallel the U.S.-Mexico border fence in the area where a Border Patrol agent was shot and killed on Tuesday October 2, 2012 west of Douglas, Arizona. One agent was killed and another wounded in the incident. (AP Photo/Arizona Daily Star, Benjie Sanders) ALL LOCAL TV OUT; PAC-12 OUT; MANDATORY CREDIT