An aggressor nation or extremist group could gain control of critical switches and derail passenger trains, or trains loaded with lethal chemicals.

You know, as director of the CIA, I got an awful lot of intelligence about all the horrible things that could go on across the world.

Well look, CIA is an agency that has to collect intelligence, do operations. We have to take risks and it's important that we take risks and that we know that we have the support of the government and we have the support of the American people in what we're doing.

I think the primary message to the world is that the United States is going to remain the strongest military power in the world.

The road to success is always under construction.

For me, success is a state of mind. I feel like success isn't about conquering something; it's being happy with who you are.

John Cougar Mellencamp - I didn't like him in the beginning. I liked some of the stuff around the 'Scarecrow' period. I go back and forth on him all the time, but I think he's a good artist. I don't know if he's a great artist or not, but he rose above his original level of achievement.

If I die prematurely I shall be saved from being bored to death at my own success.