We want our children to live in an America...that isn't threatened by the destructive power of a warming planet.

I do think that you're starting to see young people pay attention to some longterm issues that they feel Washington has neglected.

I agree with the basic principle that anybody who wants to serve in our armed forces and make sacrifices on our behalf, on behalf of our national security, anybody should be able to serve. And they shouldn't have to lie about who they are in order to serve.

That's the true genius of America: that America can change. Our union can be perfected. What we've already achieved gives us hope for what we can and must achieve tomorrow.

Here's the truth: even if countries like the United States curb our emissions, if growing countries like India - with soaring energy needs - don't also embrace cleaner fuels, then we don't stand a chance against climate change.

You not only do you appreciate the sacrifices people have made and the hours they've kept and the soccer games they missed and the birthday parties, but I also had a lot of young people who came in here [to White House], and this probably, you know, echoes with you, in your own experience, you were young when you got here.

The amount of information, the amount of incoming that any administration has to deal with today and respond to much more rapidly than ever before, that makes it different.