The US military shot down a Syrian fighter jet on Saturday. The White House is insisting the action was taken in self-defence.
But the Russian and Syrian governments have condemned it.
What does this mean for the war in Syria?
Presenter: Sohail Rahman
Pavel Felgenhauer – defence and military analyst; a columnist with the Russian newspaper Novaya Gazeta
Jean-Marc Rickli – head of global risk at the Geneva Centre for Security Policy
Larry Korb – senior fellow at the Centre for American Progress; a former naval flight officer