Across the country — from DC to Los Angeles to Chicago — the military is more visible in daily life than it’s been in years. But behind the boots on the ground lies a much bigger system. One that puts grenade launchers in the hands of police, surveils our every step, and ships weapons overseas. And it's grown bigger and more powerful than ever before.  This season on Things That Go Boom, we trace the reach of the military-industrial complex: how decisions in Washington fuel a trillion-dollar industry, how that industry shapes our cities and neighborhoods, and how people on the ground are responding.