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

These days, it takes only seconds - seconds - for a picture, a photo, to suddenly become an international headline.

In this century, the 21st century, the U.S. recognizes our prosperity and our security depends even more on the Asia-Pacific region.

We are a nation at war. This is also a time for hard choices. It's about ensuring that we are able to prevail in the conflicts in which we are now engaged. But it's also about being able to be strong and disciplined in applying our nation's limited resources to defending America.

Rather than undermining the Palestinian Authority, it is in Israel's interests to strengthen it by... continuing to transfer Palestinian tax revenues and pursuing other avenues of cooperation.

Winning in Afghanistan is having a country that is stable enough to ensure that there is no safe haven for Al Qaida or for a militant Taliban that welcomes Al Qaida. That's really the measure of success for the United States.

I don't think there's any question that America is safer as a result of the bin Laden operation.