John Kerry: “Global leadership is a strategic imperative for America, not a favor we do for other countries.”

We're spending billions--literally, actually, trillions.

It's a matter of mathematics and physics, not politics, not ideology. It is a response to the science.

Nothing is agreed to until everything is agreed to.

What we are trying to achieve now is really to establish some stability if we can, in the relationship, without conceding anything.