Sunlight pours through shrapnel holes in a shipping container in Kabul's Old City, where users gather for a hit of opium.
Eight percent of Afghans are addicted to drugs, often opium or heroin, a rate that has risen sharply in the past five years. Only one in ten addicts receives any drug treatment, because programs are rare and underfunded.
(Courtesy of David Guttenfelder/National Geographic)