Piers Morgan, host of CNN's "Piers Morgan Tonight," leaves the CNN building in Los Angeles, Tuesday, Dec. 20, 2011. A tense and sometimes hostile Piers Morgan refuses to disclose details about the most damning link between himself and Britain's phone hacking scandal ? his acknowledgment that he listened to a phone message left by Paul McCartney for his then-wife Heather Mills. (AP Photo/Jae C. Hong)