The In-N-Out in Pleasanton had the feel of any summer night: teenagers milling about the parking lot, cars idling in the drive-thru, the smell of fries hanging in the air.
Nader Hanna was there last month with his twin brother and friends, having graduated high school just three days earlier. They’d come for burgers and to play with fireworks, the same thing they did many other nights.
A classmate handed Hanna a firework the size of a tennis ball, and he lit it…