More than 70 million people tuned into to see gaffe-prone vice-presidential contenders Joe Biden and Sarah Palin square off in 2008, making it the most-watched veep debate in American history.
Held at Washington State University in Pullman, Washington, the 90-minute debate represented Palin's chance to redeem herself after a series of disastrous interviews and public mis-steps. She also became the first female candidate to appear in a vice-presidential or presidential debate since Geraldine Ferraro in 1984.