On Sept. 10, 2001, I was on the Mexico-United States border at Naco Station near Tucson, Ariz. I saw miles and miles of unprotected border with the occasional lone agent driving by. What little fencing there was had major holes cut open, allowing illegal immigrants easy access.

A U.S. Border Patrol agent was killed and another wounded in a shooting early Tuesday in Arizona near the U.S.-Mexico line, according to the Border Patrol.