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Who's your CNN Hero of the Year?
Leo McCarthy's nonprofit, Mariah's Challenge, gives college scholarships to teenagers who pledge not to drink.
The story behind the Hero
Five years ago, Leo McCarthy lost his 14-year-old daughter, Mariah, when a drunken driver hit her and two of her friends as they walked down a sidewalk.
Want to get involved? Check out the Mariah's Challenge website and see how to help.
Support the cause
Exploring the issue
What sways teens not to drink and drive? Experts have found that it's personal stories, not stats, that really resonate.