A visit to America’s leading trade show for state violence.

Thousands of internal documents help explain how, through brutality and bureaucracy, the Islamic State stayed in power for so long.

There’s no telling how many guns there are in America—and when one gets used in a crime, no way for the cops to connect it to its owner. The only place the police can turn for help is a Kafkaesque agency in West Virginia, where, thanks to the gun lobby, computers are illegal and detective work is absurdly antiquated. On purpose.