** FILE ** U.S. Border Patrol agent Jerry Conlin looks out over Tijuana, Mexico, behind, along the old border wall along the U.S. - Mexico border, where it ends at the base of a hill in San Diego, June 13, 2013. (AP Photo/Gregory Bull, File)

** FILE ** U.S. Border Patrol agent Jerry Conlin looks out over Tijuana, Mexico, behind, along the old border wall along the U.S. - Mexico border, where it ends at the base of a hill in San Diego, June 13, 2013. (AP Photo/Gregory Bull, File)