Focus Is US-Mexico border secure enough? Immigration reform could hinge on answer.

What did the post-9/11 border patrol surge of manpower and equipment achieve? Understanding its successes and failures could be crucial to the new immigration reform effort.

By , Correspondent

Shari V. Hill/Las Cruces Sun-News/AP

Travelers on Interstate 19 don't need any "Welcome to Mexico" signs to know that the border is near.