Is U.S.-Mexico border secure enough?

By Elizabeth Aguilera

Along the U.S.-Mexico border, fortification has reached an all-time peak.

The ranks of Border Patrol agents top 17,600. Nearly 650 miles of additional fencing is up. Four unmanned drones patrol from California to the Gulf of Mexico. Twelve hundred National Guard soldiers are on the ground. Camera systems numbering 467 sweep the perimeter and 10,800 ground sensors lie in wait.

Given this unprecedented expansion in resources during the past decade, U.S. government officials said the southwest border is the tightest it has ever been.

Skeptics and “border security firstâ€