Alex Trebek, Pat Sajak and Vanna White celebrate Jeopardy! and Wheel of Fortune producer Harry Friedman's Hollywood Walk of Fame star

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"It has also been my honor to work with some of the brightest minds in television daytime: Mark Goodson, Merrill Heater, and I would put Harry Friedman in that company as well," Trebek said at Friday's ceremony honoring Friedman, who is retiring next year.