Violence across border frightens Nogales residents

Violence across border frightens Nogales residents

Violence across border frightens Nogales residents

SEPARATED: This 2006 file photo shows a border fence that separates the U.S., left, from Mexico in downtown Nogales, Ariz. A spate of drug-related killings the past few months in Nogales, Mexico, is keeping some residents in its U.S. sister city from crossing the border.