Prison!

Irena gave me this link.  Here's a particularly striking passage:

America now has more prisoners, 2.3 million, than any other country in the world. Ever. Our rate of incarceration is roughly seven times that of Canada or any Western European country. Stalin, at the height of the Soviet gulag, had fewer prisoners than America does now (although admittedly the chances of living through American incarceration are quite a bit higher). We deem it necessary to incarcerate more of our people—in rate as well as absolute numbers—than the world's most draconian authoritarian regimes. Think about that. Despite our "land of the free" motto, we have more prisoners than China, and they have a billion more people than we do.
If 2.3-million prisoners doesn't sound like a lot, let me put this number in perspective. It's more than the total number of American military personnel—Army, Navy, Air Force, Marines, Coast Guard, Reserves, and National Guard. Even the army of correctional officers needed to guard 2.3-million prisoners outnumbers the U.S. Marines. If we condensed our nationwide penal system into a single city, it would be the fourth-largest city in America, with the population of Baltimore, Boston, and San Francisco combined.