was passed over to succeed Johnny Carson
as host of The Tonight Show
, but is now poised to dethrone Carson as the longest-running late-night star in TV history. Letterman, 64, is nearing a deal with CBS that would keep him behind the desk of the Late Show
through 2014, according to The New York Times
. 2014 will mark his 32nd year in Late Night (11 years on NBC's Late Night
followed by what would be 21 years on CBS).? Carson ...