Last month, Omar Gonzalez, an Iraq War veteran from Texas, hopped the White House fence, overpowered a guard, and made it all the way into the East Room before he was apprehended by a Secret Service agent. Gonzalez had a knife on his person, and it soon emerged that he had previously been arrested in July, when state troopers in Virginia found semi-automatic weapons, sniper rifles, and a map of the White House in his car.