Officials say OK to border fence BY JONATHAN ATHENS, STAFF WRITER Published on: July 20, 2005 Federal authorities on Tuesday said the largest vehicle barrier project in the nation, concrete-reinforced steel beams stretching 123 miles along the Arizona-Mexico border, will move forward. The purpose, they say, is to stop commercial alien smugglers, drug traffickers and illegal immigrants from driving vehicles across the Mexico border into the U.S. east of San Luis, Ariz. to the Organ Pipe Cactus National Monument south of Ajo. Yuma sector U.S. Border Patrol spokesman Joe Brigman said: "Not only will it enhance our ability to gain...