On the Plain of SnakesMaster travel writer Paul Theroux immerses himself in the fascinating, rich and troubled culture of modern Mexico Nogales is a border town caught between Mexico and the United States of America. A 40 foot steel fence runs through its centre, separating the prosperous US side from the impoverished Mexican side. It is a fascinating site of tension, now more than ever, as the town fills with hopeful border crossers and the deportees who have been caught