Biden to Obama: "A big [expletive] deal"

After introducing Obama at Tuesday's health-care bill signing ceremony, Vice President Biden turned to the president and said, "This is a big [expletive] deal."

Shortly after the event, press secretary Robert Gibbs said on Twitter, "Powerful moment when the President described the people he was signing this for and for the millions back in control of their health care ... And yes Mr. Vice President, you're right."

It wasn't the first time Biden was caught cursing on an open mic.