June 3, 2017:

In the crush a woman with bloodied hands performs CPR. As gunfire crackles the people don't even duck. They're so exposed there's no point.

It's a war zone, but only one side is shooting. A man in a highrise with unlimited ammunition.

Crowd, running, walking. A man's been shot through the arm; a policeman checks his torso for entrance wounds. Police are under fire, crouched behind low concrete walls.

Who, why, how?

Americans. Because they can. Because it's who we are.