"From Under Kabul's Briges, Addicts Get Help at Old U.S. Base", The New York Times, January 10, 2016.
Cultural History of Opium. Over the last few decades Afghanistan has become the largest opium producer in the world. However, its early beginnings are found to be from outside Afghanistan. Read more in "On the Cultural History of Opium - and how poppy came to Afghanistan", Afghanistan Analysts Network (AAN), January 11, 2016.