"Homeland Security as a Theory of Action: The Impact on U.S./Mexico Border Management"
By Alan Bersin and Mike Huston - Wilson Center
The terrorist attack on 9/11 in effect closed America’s borders. The drawbridges were raised, airports and seaports shut down and cross-border traffic at land ports of entry was reduced to a trickle. Defense and security and enforcement became the exclusive orders of the day.
Nowhere else was the impact more devastating than on the U.S./Mexico Border where every person was completely screened and every vehicle thoroughly searched. Wait times could be measured by days not hours and lines stretched on miles beyond sight. . . .