20/20: How Young Is Too Young?

First, look at some breaking news of a crane that collapsed in New York City that caused injuries and deaths. This is one in a string of recent crane crashes. Then, from teenage paparazzi to steroids in youth sports and even parents who encourage their kids to do ultimate fighting, a report on young people who push the envelope for better or worse. Additionally, how young is too young to be the target of the paparazzi? Stars Sarah Jessica Parker and Selma Hayek speak candidly about the constant battle to keep their kids out of the public eye.