What If the Tsarnaevs Had Been the “Boston Shooters”?

Here’s a little mental experiment. Imagine, for a moment, that the Tsarnaev brothers, instead of packing a couple of pressure cookers loaded with nails and explosives into their backpacks a week ago Monday, had stuffed inside their coats two assault rifles—Bushmaster AR-15s, say, of the type that Adam Lanza used in Newtown. What would have been different?

Well, for one thing, the brothers would probably have killed a lot more than three people at the marathon. AR-15s can fire up to forty-five rounds a minute, and at close range they can tear apart a human body. If the Tsarnaevs had started firing near the finish line, they might easily have killed dozens of spectators and runners before fleeing or being shot by the police.

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