 And so the U.S. sort of withdrew that threat. But unfortunately, what ended up happening is that over the course of the next 10 years, Bashar al-Assad actually did continue to use chemical weapons in the form of chlorine gas at least 350 times that we know of and sarin gas at least one other time as well. So by 2014, it's become a protracted conflict. Remind us of the extremist groups that then stepped into the power vacuum.