Heroin sold in the U.S., like this dose confiscated in Alabama last fall, is often cut with other drugs. Tamika Moore/AL.com/Landov hide caption

itoggle caption Tamika Moore/AL.com/Landov

Cover art from Stoned. Current hide caption

itoggle caption Current

Shannon Rivers, a member of the Akimel O'odham tribe, lights a fire for the purification ceremony at the Coconino County jail. Inmates will help him put blankets over the sweat lodge structure, place heated rocks inside and pour water over them. Laurel Morales/KJZZ hide caption

itoggle caption Laurel Morales/KJZZ

Needle exchange programs, like this one in Portland, Maine, offer free, sterile syringes and needles to drug users. The programs save money and lives, health officials say, by curtailing the spread of bloodborne infections, such as hepatitis and HIV. Robert F. Bukaty/AP hide caption

itoggle caption Robert F. Bukaty/AP

Workplace drug testing for marijuana may need updating in light of changing laws, a case before the Colorado Supreme Court suggests. Kai-Huei Yau/MCT/Landov hide caption

itoggle caption Kai-Huei Yau/MCT/Landov

A man smokes marijuana outside Uruguay's parliament in Montevideo on Wednesday, where lawmakers in the lower house debated and passed a bill that would legalize marijuana and regulate its production and distribution. Matilde Campodonico/AP hide caption

itoggle caption Matilde Campodonico/AP