And something nobody expected took place. The study in the Archives of General Psychiatry—and the experiences people could see all across the country—show that 95 percent of them, within a year, simply stopped. The addicts who received drug treatment and rehab were no more likely to stop than those who received no treatment at all. A tiny number of vets did carry on shooting up. They turned out either to have had unstable childhoods, or to have been addicts before they went.

