"Are cops constitutional?"

How did America’s police become a military force on the streets?

Police departments across the country now sport armored personnel carriers designed for use on a battlefield. Some have helicopters, tanks and Humvees. They carry military-grade weapons. Most of this equipment comes from the military itself. Many SWAT teams today are trained by current and former personnel from special forces units like the Navy SEALs or Army Rangers. National Guard helicopters now routinely swoop through rural areas in search of pot plants and, when they find something, send gun-toting troops dressed for battle rappelling down to chop and confiscate the contraband. But it isn’t just drugs. Aggressive, SWAT-style tactics are now used to raid neighborhood poker games, doctors’ offices, bars and restaurants, and head shops—despite the fact that the targets of these raids pose little threat to anyone. This sort of force was once reserved as the last option to defuse a dangerous situation. It’s increasingly used as the first option to apprehend people who aren’t dangerous at all.