Rancher John Ladd on his property adjacent to the Arizona-Mexico border near Naco, Arizona, March 29, 2013. On a recent day in late March, Arizona rancher Ladd watched one group of three migrants come by his house a short distance north of the Mexico border fence, then a second group with three people, then a third with four. Picture taken March 29, 2013. REUTERS/Samantha Sais (UNITED STATES - Tags: SOCIETY IMMIGRATION)