You know, there was a recent poll which said that young people in the generation of the students here felt it was far more likely that they would see a UFO than that they would draw Social Security... It's very important you understand this. Once you understand this, you realize this is not an episode from the X Files, and you're not more likely to see a UFO if you do certain specific things.

I have never believed we had to choose between either a clean and safe environment or a growing economy. Protecting the health and safety of all Americans doesn't have to come at the expense of our economy's bottom line. And creating thriving companies and new jobs doesn't have to come at the expense of the air we breathe, the water we drink, the food we eat, or the natural landscape in which we live. We can, and indeed must, have both.

I love the HRC. The initials are great.

Without question, bicycling is an efficient, economical and environmentally sound form of transportation and recreation. Bicycling is a great activity for families, recreational riders and commuters. Hillary, Chelsea and I have bicycles.

Our military superiority is so great - it's far greater than it was in the Gulf War, and the Gulf War was over in 100 hours after we bombed for 43 days. And so now they can bomb for a couple of days and then just roll into Baghdad... The odds are there's going to be a war and it's going to be not for very long.

Though I often disagree with Republicans, I never learned to hate them the way the far right that now controls their party seems to hate our president [Barack Obama] and a lot of other Democrats.

The most profound security threat we face today is global warming....climate change has the capacity to change the way all of us live.