John Kerry: “We are way behind the clock here in terms of engaging.”

The message coming out of this COP is, we are moving away from fossil fuels. We are not turning back. That is the future.

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

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

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.