John Kerry: “The centrifuges are spinning, the clock is ticking, and they seem to be managing the sanctions that we have levied so…”

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

Obviously, we're already seeing ways in which it's going to affect people.

Depending on what it involves, shadow diplomacy has also saved us from a war.

I do not think that the choice we make with respect to Africa ought to be just based on what China is doing.