bozddr security is enough. the u.s. has 20,000 border patrol agents. that's twice as many as we had nine years ago. they are a big presence here in nogales, arizona, and soon they'll be joined by the national guard. it's all in a day's work for agent rudy garcia. helping his fellow border patrol agents round up people trying to cross illegally from nogales, mexico into nogales, arizona. the heavy presence of border patrol agents here has kept nogales safe, in spite of a raging drug war on the mexican side of the border. >> there have been 130 on the mexican side. we have not had a homicide here in three years. >> reporter: out in the arizona desert there is a different statistic. in july, authorities in tucson recovered the bodies of 57