Families harvest poppy bulbs in the Badakhshan province of Afghanistan. To collect the opium, they score the bulbs and let the milky substance ooze out. The dried residue contains about 10 percent morphine. David Guttenfelder/AP/National Geographic hide caption

itoggle caption David Guttenfelder/AP/National Geographic

Tom Robichaud launched his business, Discreet Intervention, six months ago. Here, he works his dog in a vacant office building, hitting on a cylinder containing cocainelike drugs. Pat Greenhouse/Boston Globe via Getty Images hide caption

itoggle caption Pat Greenhouse/Boston Globe via Getty Images

A man walks past a fresh grave in the Kamar Kulagh slum outside of Herat. David P. Gilkey/NPR hide caption

itoggle caption David P. Gilkey/NPR

Joaquin "El Chapo" Guzman is escorted to a helicopter in handcuffs by Mexican navy marines at a navy hanger in Mexico City on Saturday. A senior U.S. law enforcement official said that Guzman, the head of Mexico's Sinaloa Cartel, was captured alive overnight in the beach resort town of Mazatlan. Eduardo Verdugo/AP hide caption

itoggle caption Eduardo Verdugo/AP

Inside the drug consumption room in Aarhus, Denmark's second-largest city. Sidsel Overgaard for NPR hide caption

itoggle caption Sidsel Overgaard for NPR

Have a talk about avoiding drug use early and often. And don't overshare. iStockphoto.com hide caption

itoggle caption iStockphoto.com