John Kerry: “A negotiated political transition remains Syria's best chance to avoid a further descent into chaos.”

We are not, I have not, President Biden has not, we are not saying to people, you should not fly.

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.