In northern Minnesota, most men either have played hockey in their youth or still are playing in a senior league – but this 94-year-old is still skating in 3-4 games a week, like a man half his age.

With handle bar mustache, Mark Sertich says, "You've gotta challenge yourself a little bit."

"I think that's what keeps you going."

(WATCH the profile above from CBS's Steve Hartman)