© AP/ Mike Wallace Mike Wallace, `60 Minutes' star interviewer, dies April 8, 2012, 9:40 AM EST NEW YORK (AP) -- CBS newsman Mike Wallace, the dogged, merciless reporter and interviewer who took on politicians, celebrities and other public figures in a 60-year career highlighted by the on-air confrontations that helped make "60 Minutes" the most successful primetime television news program ever, has died. He was 93. Wallace died Saturday night, CBS spokesman Kevin Tedesco said. Bing: Watch clips of Mike Wallace's '60 Minutes' interviews Until he was slowed by heart surgery as he neared his 90th birthday in 2008, Wallace continued making news, doing "60 Minutes" interviews with such subjects as Jack Kevorkian and Roger Clemens. He had promised to still do occasional reports when he announced his retirement as a regular correspondent in March 2006. Check out msnNOW: The social trends people are talking about Wallace said then that he had long vowed to retire "when my toes turn up" and "they're just beginning to curl a trifle. ... It's become apparent to me that my eyes and ears, among other appurtenances, aren't quite what they used to be." Among his later contributions, after bowing out as a regular, was a May 2007 profile of GOP presidential hopeful Mitt Romney, and an interview with Kevorkian, the assisted suicide doctor released from prison in June 2007 who died June 3, 2011, at age 83. www.msn.com .