Barack Obama: “Well, what's happened has been heartbreaking, but, when you start talking about chemical weapons in a country that has…”

“Well, what's happened has been heartbreaking, but, when you start talking about chemical weapons in a country that has the largest stockpile of chemical weapons in the world, where, over time, their control over chemical weapons may erode, where they're allied to known terrorist organizations that in the past have targeted the United States, then there is a prospect, a possibility in which chemical weapons -- they can have devastating effects -- could be directed at us.”