From the NYT
ISTANBUL — Intensifying pressure on the Islamic State, United States warplanes for the first time attacked hundreds of trucks on Monday that the extremist group has been using to smuggle the crude oil it has been producing in Syria, American officials said.
According to an initial assessment, 116 trucks were destroyed in the attack, which took place near Deir al-Zour, an area in eastern Syria that is controlled by the Islamic State.
Of course this is totally unconnected with any recent development at the G20. Why would anyone think otherwise?