On Friday, August 10th, "World News" anchor Charlie Gibson will go primetime with his special report: "Pastor to Power: Billy Graham and the Presidents." The 20/20 special takes an indepth look at "the world's most famous evangelist" and his special access to the world's most powerful men: the presidents of the United States.

Look for Gibson's "remarkable, exclusive round table discussion with Jimmy Carter, George H.W. Bush, and Bill Clinton."

And in a revealing interview, Hillary Clinton confides that during the worst days of the Monica Lewinsky scandal, she turned to Graham. "He was someone who could understand both Bill and me, and there aren't many people who can," she said.