What Is an Icon? Memorable Moments From Alex Trebek's Decades-Long 'Jeopardy!' Career

Alex Trebek stepped behind the lectern to host "Jeopardy!" for the first time on Sept. 10, 1984. Since then, he has shared some memorable moments with fans across the country and around the world: cracking jokes, helping contestants propose and showing off his rap skills. Trebek recently announced he was diagnosed with stage 4 pancreatic cancer and vowed to fight as hard as he can.