Lets look at what happened in terms of people. Currently. there are 70 miles of fencing along the U.S.- Mexican border. including 40 miles in California and 25 in Arizona. Partial fencing of the U.S.-Mexican border shifted migrant traffic from one area to the other. The apprehensions dropped in San Diego from a high of 450.000 in 1994. when fencing construction began. to a low of 136.000 in 2005. a reduction of 70 percent. Over the same period. the apprehensions in the Tucson sector. covering most of Arizona. rose from 137.000 in 1994 to 489.000. almost an exact shift In migrant traffic from San Diego to Arizona. So the number of apprehensions along the U.S. border from 1994 to 2005 has barely fluctuated. ranging from 900.000 to well over a million per year. What the facts show is that having largescale fences has been grossly inadequate. if we are talking about security.