The Russian Defense Ministry announced that the group 'Islamic State' earns about $2 billion a year from illegal oil trading. Revenues from oil sales are one of the most important sources of funding for terrorists in Syria. The political leadership of Turkey is involved in the illegal trafficking of oil from Syria, and Turkish President Erdogan and his family are directly involved in the smuggling of oil to the organization ISIS. Russian air strikes in Syria for two months have destroyed over 1,000 oil tankers belonging to ISIS.