There's an old saying in Tennessee — I know it's in Texas, probably in Tennessee — that says, fool me once, shame on — shame on you. Fool me — you can't get fooled again.

I want our enemies to understand that don't think that their violent acts are going to cause this president to leave before the job is done. And I want our troops to understand we respect them and that the sacrifices they make are noble and necessary for peace.

Now, we have inscribed a new memory alongside those others. It's a memory of tragedy and shock, of loss and mourning. But not only of loss and mourning. It's also a memory of bravery and self-sacrifice, and the love that lays down its life for a friend-even a friend whose name it never knew.

Ours is a nation that does not seek revenge.

Mankind is drawn to the heavens for the same reason we were once drawn into unknown lands and across the open sea. We choose to explore space because doing so improves our lives, and lifts our national spirit. So let us continue the journey.

The North Korean regime remains one of the world's leading proliferator of missile technology, including transfers to Iran and Syria. The transfer of nuclear weapons or material by North Korea to states or non-state entities would be considered a grave threat to the United States, and we would hold North Korea fully accountable of the consequences of such action.

After the chaos and carnage of September 11th, it is not enough to serve our enemies with legal papers.