In this May 22, 1992 file photo, host Johnny Carson wipes his eye after watching a series of clips from earlier shows during the last taping for their final broadcast of "The Tonight Show" in Burbank, Calif. With his debut as host of NBC's "The Tonight Show" 50 years ago this October, until he retired from the show on May 22, 1992, he was seen by more people on more occasions than anyone else in American history. "Johnny Carson: King of Late Night," a two-hour "American Masters" portrait premiers Monday at 9 p.m. EDT on PBS. (AP Photo/Douglas Pizac, file)