As going gets tougher, Americans discover laughter

With the US economy slumping, the going has got very tough, but the tough are no longer shopping. They're laughing. Not just any old laughter, but laughter yoga, a form of exercise that blends bold belly laughs and noisy "meditation" with rhythmic clapping, waddling around like a penguin or taking part in a conga line, and deep, yogic breathing.