AT A GUESS, SOMETIME AFTER JANUARY 20, 2017: Angry protesters in Chattanooga: When’s the government going to do something? “The attack in Chattanooga, and the raw anger it has provoked here, illustrate the increasingly daunting odds that U.S. counterterrorism agencies face in an era marked by surging Islamist propaganda and a proliferation of disparate, self-radicalized, one-off threats.” And elevated immigration from Muslim countries.

Meanwhile, it’s self-help: “At Carl Poston’s family-owned gun shop, a few miles from Abdul­azeez’s home, demand for concealed-carry classes doubled in the days after the shooting. Shooter’s Depot, a gun store on the other side of town, said it had seen a fivefold increase, with as many as 100 people a day requesting spots in the gun classes.”

If the government can’t defend you — or even itself — what’s it good for again?