I'm a professor of national security studies, and I know a lot more about fighting than Rumsfeld does.

From time to time, the irresponsible acts of the Cuban government remind us that this is far more than about the freedom of one country, but it really is about the stability and security of the region and the national security interests of the United States.

The U.S. now imports over half of its oil supply from the Middle East. This dangerous dependence on foreign energy sources is an issue of national security.

Stable energy prices and enhanced national security will only come when we increase domestic energy resources, which was accomplished today with the opening of ANWR.

The war on terrorism has made national security a legitimate concern, and a rising deficit, changes brought on by globalization and even the price of oil have thrown the nation's economic health into question.

The Clinton White House today said they would start to give national security and intelligence briefings to George Bush. I don't know how well this is working out. Today after the first one Bush said, 'I've got one question: What color is the red phone?'

Hydrogen holds great promise to meet many of our future energy needs, and it addresses national security and our environmental concerns. Hydrogen is the simplest, most abundant element in the universe.

The high prices also highlight the fact that the U.S. is too heavily dependent on fossil fuels that we import from unstable parts of the world. To protect our national security, we must become more energy secure.

I believe that our national security lies not just in protecting our borders, but in bridging divides.

It is often in the name of cultural integrity as well as social stability and national security that democratic reforms based on human rights are resisted by authoritarian governments.

WikiLeaks presents a clear and present danger to the national security of the United States.

I believe that successfully addressing our national security needs while protecting our basic freedoms and civil liberties requires continual Congressional oversight, and I will continue to work to assert the role of this body in carrying out this grave responsibility.

The War on Terror is one of the most critical national security efforts in our history.

A healthy and fully functioning society must allocate its resources among a variety of competing interests, all of which are more or less valid but none of which should take precedence over national security.

First, we must stop issuing drivers' licenses to people in our country illegally. Providing them with forms of government identification makes a mockery of our laws and undermines national security efforts.