We've seen a lot of Barack Obama here in Colorado in recent weeks. But Sunday's event was the biggest anywhere in the country so far -- well over 100,000 people at Civic Center Park. This episode is a soundscape of the rally and ends with Darlene making yet another phone call in search of volunteers to help get out the vote in this crucial battleground state.

Click here for a video of the last few minutes of Obama's speech. And here's a touching video of an elderly volunteer who had a chance to meet the candidate in Boulder.