Pauley Perrette says goodbye to Abby on "NCIS"

Actress Pauley Perrette's character from the series "NCIS," Forensic Specialist Abby Sciuto, is one of the best-loved crimefighters on TV. But now, Pauley's decided to leave the show, and after 15 years, she's having a hard time letting go. Correspondent Tracy Smith talks with Perrette about life beyond Abby - from her long fascination with criminal science, to the more than two dozen charities which she supports, including her pet charity, the Amanda Foundation, a non-profit animal rescue in Beverly Hills.