http://www.jamestown.org/terrorism/news/article.php?articleid=2369866
Hayder Mili
"Since the early 1990s, Western law enforcement agencies have noted an increasing reliance on criminal activity by terrorist networks around the world. Funding sources from the Persian Gulf, charities and other non-governmental fronts have been placed under pressure. This development, compounded by the arrests of several high-ranking coordinators and financiers of operations in Europe and North America - such as Abu Doha and Fateh Kamel - have compelled jihadi networks to adapt and further diversify their funding sources. Consequently 'traditional' criminal activities like drug trafficking, robbery and smuggling are rapidly becoming the main source of terrorism funding. In fact, many recent terrorist attacks have been partly financed through crime proceeds. "