CHARLESTON, SC - JULY 23: (L-R) Democratic presidential candidates former Sen. Mike Gravel (D-AK), Sen. Christopher Dodd (D-CT), former Sen. John Edwards (D-SC), Sen. Hillary Clinton (D-NY), Sen. Barack Obama (D-IL), New Mexico Governor Bill Richardson, Sen. Joseph Biden (D-DE), and Rep. Dennis Kucinich (D-OH) listen to a YouTube question from Mike Green during the YouTube-CNN Presidential Debate at The Citadel July 23, 2007 in Charleston, South Carolina. The two-hour broadcast, featuring all eight declared Democratic candidates and moderated by Anderson Cooper (C), consisted of video questions submitted on YouTube by citizens across the country, instead of from the 2,000-member audience gathered at The Citadel's McAlister Field House. Getty Images logo Getty Images 31 months ago

CHARLESTON, SC - JULY 23: (L-R) Democratic presidential candidates former Sen. Mike Gravel (D-AK), Sen. Christopher Dodd (D-CT), former Sen. John Edwards (D-SC), Sen. Hillary Clinton (D-NY), Sen. Barack Obama (D-IL), New Mexico Governor Bill Richardson, Sen. Joseph Biden (D-DE), and Rep. Dennis Kucinich (D-OH) listen to a YouTube question from Mike Green during the YouTube-CNN Presidential Debate at The Citadel July 23, 2007 in Charleston, South Carolina. The two-hour broadcast, featuring all eight declared Democratic candidates and moderated by Anderson Cooper (C), consisted of video questions submitted on YouTube by citizens across the country, instead of from the 2,000-member audience gathered at The Citadel's McAlister Field House.