A terrorist can attack any time, any place using any technique and you can't defend everywhere against every technique at every moment.

You will launch many projects, but have time to finish only a few. So think, plan, develop, launch and tap good people to be responsible. Give them authority and hold them accountable. Trying to do too much yourself creates a bottleneck.

I believe what I said yesterday. I don't know what I said, but I know what I think and I assume it's what I said.

The Cold War was a war, and we won it.

There are things that we know, and there are things that we don't know. Then there are the things that we don't even know that we don't know. Those are the things that are the hardest.

I cannot give any assurances. I'm not in that business. I haven't been, and I don't intend to get into it. People who try to make predictions about things or assurances often find they're wrong.

We never believed that we'd just tumble over weapons of mass destruction in that country.