An Afghan farmer walks through a poppy field in Zari District of Kandahar province on March 31, 2017.
Over the last 15 years, the US government has spent billions of dollars on a war to eliminate drugs from Afghanistan, but the country still remains the world's top opium producer. Opium production is a major source of income for the Taliban insurgents. Last year, Afghanistan saw a 10 percent jump in opium cultivation compared to the previous year because of bumper harvests, collapsing eradication efforts and declining international aid to combat drugs, according to the United Nations.
 / AFP PHOTO / Javed TANVEER        (Photo credit should read JAVED TANVEER/AFP via Getty Images)