The United States is unable to overcome the popularity of the Islamic State. A September report from US Congress said that despite the air strikes, the number of ISIS militants has been growing steadily. Why is the US-led coalition ineffective?
Ivan Konovalov, director of the Center for Political Environment.
"The US allies have faced the dilemma since the very start: if ISIS is weaker, Assad is stronger. They have never had a clear strategy because of that. Secondly, the allies did not have ground support. The United States officially supports The Free Syrian Army, and the Saudis support "Al-Nusra - there is no single structure.
"Not all NATO members are involved in the operations in Syria. There's only the United States, the French and their Gulf allies - Saudi Arabia, Bahrain, Qatar, United Arab Emirates. All the rest (the British, the Belgians and many other countries are in the Iraqi war zone."