We need to make sure that leaks of classified information, of national security secrets, needs to be rigorously pursued and prosecuted to the fullest extent of the law.

The risk of just one terrorist with just one nuclear weapon is a risk we simply cannot afford to take.

Poverty does not cause violence and terrorism. Lack of education does not cause terrorism.

Unfortunately, in war, there are casualties, including among the civilian population.

I go to bed at night worrying that I didn't do enough that day to make sure I protect the American people.

I'm not ideological. I think sometimes when people are ideological, the world's a lot easier. Because it falls into either right or wrong, or black or white, or whatever. To me, I'm still trying to figure out a lot of things.

Yes, war is hell. It is awful. It involves human beings killing other human beings, sometimes innocent civilians. That is why we despise war.