<P> The start of the border fence in the state of New Mexico--just west of El Paso, Texas </P> <Li> <P> U.S. Border Patrol helicopter along El Camino del Diablo, Arizona--Sonora border, 2004 </P> </Li> <P> U.S. Border Patrol helicopter along El Camino del Diablo, Arizona--Sonora border, 2004 </P> <Li> <P> Border between Nogales, Arizona, on the left, and Nogales, Sonora, on the right </P> </Li>

How far is mexico city from us border