Terror threat shuts down schools across Los Angeles

Aired: 12/15/2015 | 0:03:07 | Clip
Public schools in Los Angeles -- 1,200 in all -- were closed after a threatening email from Germany warned of mass violence, from guns to bombs to nerve gas. Officials in New York say they received a similar message, but discounted it as a hoax, leaving schools open. Gwen Ifill reports.