10/25: Quarantined nurse tests negative for Ebola virus; Despite age, 100-year-old math teacher pushes on

An American nurse has tested negative for Ebola after being isolated when she arrived in the U.S. from Sierra Leone. As Jericka Duncan explains, Kaci Hickox says she hasn't had a positive experience with New Jersey health officials; and, even at 100 years old, Madeline Scotto climbs to her second-floor classroom three times a week. And, as Michelle Miller explains, the only number Scotto doesn't take seriously is her age.