Stephen Schwarzman is one of the richest men in America, worth an estimated $17 billion. Now, he's sharing his secrets to success in his book "What It Takes." From the White House to the Vatican, Schwarzman's plainspoken advice is in high demand. He got his start on Wall Street. "I was the most junior person in the room and [one of my bosses] just started screaming at me that I wasn't sitting up straight and what was I doing at this meeting?" Schwarzman recalled.