They say, "Never forget," but their actions tell a very different story.
Jon Stewart's been busy since he ended his more than 16-year run as host of "The Daily Show."
And while he may not have been popping up on your TV to give his take on the day's news, he hasn't exactly been kicking back and relaxing in his retirement.
He's been helping turn his 12-acre farm outside New York City into an animal sanctuary, and he's continued his work trying to help 9/11 first responders get the health care they need and deserve. It's the latter cause that's got him back in the news.