Of course, there is no question that Libya - and the world - will be better off with Gaddafi out of power. I, along with many other world leaders, have embraced that goal, and will actively pursue it through non-military means. But broadening our military mission to include regime change would be a mistake.

Nations are more successful when their women are successful.

One of the things that I am concerned about is the degree to which we've seen a lot of commentary lately where there were, there are Republicans or pundits or cable commentators who seemed to have more confidence in Vladimir Putin than fellow Americans because those fellow Americans were Democrats. That cannot be.

There are folks who will equivocate. They'll say, 'You know, I'm not a scientist.' Well, I'm not either. But the best scientists in the world know that climate change is happening.

As Commander in Chief, I will maintain the strongest military in the world, keep faith with our troops and go after those who would do us harm. But after a decade of war, I think we all recognize we've got to do some nation building here at home, rebuilding our roads, our bridges and especially caring for our Veterans who sacrificed so much for our freedom.

As the world's largest economy and second-largest carbon emitter, as a country with unsurpassed ability to drive innovation and scientific breakthroughs, as the country that people around the world continue to look to in times of crisis, we've got a vital role to play. We can't stand on the sidelines. We've got a unique responsibility.

The American story has never been about things coming easy. It has been about rising to the moment when the moment is hard. About rejecting panicked division for purposeful unity. About seeing a mountaintop from the deepest valley. That is why we remember that some of the most famous words ever spoken by an American came from a president who took office in a time of turmoil: "The only thing we have to fear is fear itself.