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 leader of the market today may not necessarily be the leader tomorrow.

Leaders don't change their positions mid-debate. They welcome scorn from the masses because it creates the opportunity for dialogue.

What's missing is leadership in the White House. And the story that Barack Obama does tell, forever shifting blame to the last administration, is getting old. The man assumed office almost four years ago - isn't it about time he assumed responsibility?

In sports and in business, the greatest leaders are those who make the best decisions in the most crucial of situations. They are the ones who focus their energy on turning tough decisions into winning decisions.