Rudy Giuliani was hailed after 9/11 as "America's Mayor," a singular figure who was more widely admired than the pope. He was brilliant, accomplished - and complicated. He was a celebrated prosecutor, a transformative New York City mayor, and a contender for the presidency. But by the end of the Trump presidency, he was reviled and ridiculed after a series of embarrassing errors. He was a major figure in both of Trump's impeachments, and ended up widely ostracized, in legal jeopardy, and facing financial ruin. This is the story of how it all began and how it came crashing down.