John Kerry: “Let me be very clear now, because I don't want anything coming out of this hearing that leaves any door open to any…”

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

No, that's not acceptable. And I believe it was an algorithm that kicked that out kind of crazily.

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.