announcer: and now ladies and gentlemen, here s johnny. [ applause ] johnny carson wouldn t just the host of the tonight show. johnny carson was the mantha america said good night to, for 30 years. and on my watch, johnny decided that 30 years was a great time to take a bow and say thank you and good day. 30 years is enough. good time to get out while you re still on top of your game plan. johnny carson retiring at the early # 0s was a great moment where a huge chunk of the ice shelf breaks off. something that s been there for years suddenly is no longer there. a tremendous part of history. that s lovely to make your make