Ali Bernard grateful for second chance in London

Roughly three months ago, U.S. wrestler Ali Bernard was on her parents' couch in Minnesota thinking she'd blown her last chance for an Olympic medal.

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Bernard was heavily favored to represent the U.S. at the London Games. But Stephany Lee took the American spot at 72 kilograms with a surprising and decisive win over Bernard at the U.S. Olympic trials in Iowa City in late April.

Then Lee got popped for pot.

A drug test Lee had taken in Iowa City came back positive for marijuana, and in late June the U.S. named Bernard to take Lee's place in London.

Bernard says she's grateful she'll have another chance to prove she's better than she showed at the trials.