And when the system fails, it is my responsibility." President Obama campaigned on a promise of "change we can believe in."

VOA: special.2010.01.23

I promise that what I have told you today is true C cross my heart.

VOA: special.2010.07.11

And if you don't kill us I'll do my best to protect you.'" Swan has kept the promise, his eyes opened to environmental problems made worse by a warming climate.

VOA: standard.2009.12.10