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Portrait of a Hero: Leo McCarthy

In memory of his daughter who was killed by an underage drunken driver, Leo McCarthy started Mariah's Challenge. The nonprofit <a href='http://www.cnn.com/2012/06/14/us/cnnheroes-mccarthy-alcohol-challenge/index.html'>gives college scholarships to teenagers</a> who pledge not to drink while they're underage.

In memory of his daughter who was killed by an underage drunken driver, Leo McCarthy started Mariah's Challenge. The nonprofit gives college scholarships to teenagers who pledge not to drink while they're underage.