John Kerry: “It is very disturbing, it is very troubling, and we will have to wait and see.”

But, we could with battery. We could with-- there's ways to make that work.

In terms of global challenges and U.S. interests, yes.

The message is, let's find a way to be able to make sure when we fly, we're not leaving emissions that we cannot capture.

The era of the Monroe Doctrine is over.