Happiness ...on 60 Minutes; Exclusive Video Only on Yahoo! News

Happiness ...on 60 Minutes; Exclusive Video Only on Yahoo! News: "The Keys to Happiness

Which is the happiest country in the world? According to a scientific study by Leicester University in England, it's Denmark. And that's despite having one of the highest tax rates in the world! Morley Safer explores why it's so great to be a Dane, and talks with a Harvard psychology lecturer who has some tips on being happy, no matter where you live!"