I remember, right after Hezbollah launched its rocket attacks on Israel, I said: This is a clarifying moment; this is a chance for the world to see the threats of the 21st century, the challenge we face.
For we have always understood that when times change, so must we, that fidelity to our founding principles requires new responses to new challenges, that preserving our individual freedoms ultimately requires collective action.
Today I challenge our nation to commit to producing 100 percent of our electricity from renewable energy and truly clean carbon-free sources within 10 years.
That's one of our biggest challenges is finding out how to do that. There are times when you have to scale back. You might be performing on a five-by-five stage in front of 12 people. That's an exaggeration but there are times when you have to turn the corner and do an acoustic set.