It was a post from January of 2010 of a TED talk given by Mike Rowe in 2009. Mike recently posted the background story of that speech that’s worth listening to as well:
[youtube https://www.youtube.com/watch?v=QK2ftLU8Ibg?rel=0]
He ad libbed that TED speech. My respect for him has gone up by a factor of ten, and it was pretty high to begin with.