Think about this: terrorism, epidemics, poverty, the proliferation of weapons of mass destruction-all challenges that know no borders-the reality is that climate change ranks right up there with every single one of them.

An old American patriot described today’s situation very well. As America fought for its independence, Benjamin Franklin said, “we must all hang together, or assuredly, we shall all hang separately.”

I believe America's best days are ahead of us because I believe that the future belongs to freedom, not to fear.

I am not a spokesperson for the church and the church is not a spokesperson for the United States of America.

George Bush's vision does not live up to the America I enlisted in the Navy to defend, the America I have fought for in the Senate, and the America that I hope to lead as president.

I'm a Catholic, raised a Catholic. I was an altar boy. Religion has been a huge part of my life. It helped lead me through a war, leads me today.

Capturing Saddam Hussein and ensuring that this brutal dictator will never return to power is an important step toward stabilizing Iraq for the Iraqis. Let's also be clear: Our problems in Iraq have not been caused by one man, and this is a moment when the administration can and must launch a major effort to gain international support and win the peace.