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.

Each and every child in this country is valuable because they are our future as a society. We cannot afford to lose a single child to ill-health, under-education, abuse, addiction, jail, or gun violence. America's highest goal should be for every child to grow up to be a successful young adult -- healthy, educated, free, secure, and a good citizen.

I mean, all of these things that [Bashar Assad] has done, there's no way even if President Obama wanted to just play along that you could actually achieve peace, because there are 65 million Sunni in between Baghdad and the border of Turkey, Syria, and Iraq, who will never, ever again accept Assad as a member - as a legitimate leader.

We do not need to divide America over who served and how. I have personally always believed that many served in many different ways.

If we don't go far enough fast enough, the damage we inflict could take centuries to undo - if it can be undone at all.

This revolution began with young people in Syria demonstrating because they wanted a future. They wanted opportunity, education, and so forth. They went out and they did it. Thugs came out and beat them up. The parents got angry that the thugs beat the kids up, and they went out and demonstrated, and they were met with bullets. They were killed. That's how this began.

Those who try to stifle the vibrancy of our democracy and shield policies from scrutiny behind a false cloak of patriotism miss the real value of what our troops defend and how we best defend our troops. We will ask questions and we will defend our democracy.