Entertainment David Letterman on retirement: 'I can no longer operate a telephone' David Letterman sits in the pit before the 99th running of the Indianapolis 500 Mile Race at Indianapolis Motorspeedway in Indianapolis, Indiana, May 24, 2015. Photo Credit: Getty Images / Jonathan Ferrey By FRANK LOVECE. Special to Newsday June 15, 2015 7:00 PM Print Share fbShare Tweet gShare Email David Letterman has opened up about his retirement, telling his hometown's Indianapolis Monthly magazine that he goes trout fishing with his son Harry and adding, apparently jokingly, that "As it turns out, after all these years of having someone make my calls for me, I can no longer operate a telephone." The former "Late Show with David Letterman" host, 68, told college friend Ron Pearson he's retained two of his assistants from the CBS program. "It's stunning what you find out about yourself when everything you've done for 33 years changes. It's like ice melting out from under you. I know that regular, responsible people probably hear me whining like this and think, 'Oh, brother.' " By FRANK LOVECE. Special to Newsday Share on Facebook Share on Twitter Comments Comments section is temporarily on hold. Here’s why.