From the AFP:

Nearly half of the 42 groups considered by the United States to be terror organisations fund their activities through drug trafficking, a top US official said in Israel Sunday.

 

The Drug Enforcement Administration’s Michael Braun told a conference on “The Global Impact of Terrorism”, organised by the International Institute for Counter-Terrorism, that the DEA “linked 18 of the 42 officially designated Foreign Terrorist Organisations (FTO) to drug trafficking activities of some sorts.”

The Global Drug Trade is estimated to generate $321.6 billion.