Gosh, I thought guns were illegal in NYC! So how is this possible: Armed Man Shoots Three in Manhattan.
The bad news is, the crowd he held hostage allowed themselves to be handcuffed, even while this guy sprayed kerosene on them. Um... when to fight, people?
The good news is two heros jumped the freak (one of them taking a bullet for her trouble) and prevented him setting everyone on fire.
If New York had a must-issue regime for concealed carry, odds are one of the 40+ people this nut had contact with in his rampage would have been armed, and the rampage would have been over before it started. And we would not be reading about it.