Barack Obama: “Bin Laden has gone deep underground. Even Zawahiri, who is more often out there, has been much more cautious.”

Now the ball’s in your court, Iowa.

helped lead some of the most significant movements for change in human history

That's what I hope every visitor to this center takes away from their experience.

We’ve now fought a war, spent billions and billions of dollars, you know, put enormous strain on our military. A lot of people have died. And it feels like we’re back where we were before we started the war, except maybe a little bit worse…