Mauricio Pineda used the wrong word. When he handed his six-month tourist visa to the inspector at the Paso del Norte Bridge, he said he "lived" in El Paso. He should have said he "stayed" in El Paso. One wrong word is all it took to confiscate his visa and ban him from setting foot in the United States for five years, making him one of a growing number of people having temporary visas seized at El Paso crossings. Pineda, a Honduran national and a marketing director in the Mexican state of Queretaro, moved to East El Paso with his...