In late-April, the Obama administration blacklisted two Lebanese money exchanges for allegedly facilitating Hezbollah’s use of narcotics trafficking profits to fund terrorist activities. In an email interview, Matthew Levitt, director of the Stein program on counterterrorism and intelligence at the Washington Institute for Near East Policy and author of the forthcoming “Hezbollah: The Global Footprint of Lebanon's Party of God,” explained the broad range of Hezbollah’s illicit activities and the growing savvy of its criminal network.

WPR: What are Hezbollah's main illicit business activities, and where is it most active? ...