I used to cross the bridge from Reynosa to McAllen every day. It was only 12 miles on the map but the divide was wider than the River. Colors changed. Rhythms shifted. Walks, tones, and languages transformed. Like entering another dimension, I would pass through this curtain into a new world where the depth of a glance contracted and deepened depending on which side of la frontera I was on. McAllen with its clean, wide streets and new cars. Modern highways sliced through cookie cutter chain restaurants (Applebees) so orderly and meticulously planned. And Reynosa with her “ Limpia y Hermosa ” signs juxtaposed the floating trash and acidic smells of the canal. There was the inch of dust that greeted me each morning on my windshield and the amputees rolling on their little pushcarts as I waited in la cola to cross the border. My doctors chided me for living en el otro lado . Too much pollution, too few regu...