After San Bernardino, a call to block online al-Qaida works

The FBI revealed this week that one of the San Bernardino shooters and an alleged co-conspirator were inspired by former al Qaeda leader Anwar al-Awlaki. The U.S. killed al-Awlaki in a drone strike four years ago, but his legacy lives on in hours of recordings. Scott Shane, a reporter for The New York Times and author of the book, Objective Troy, joins Hari Sreenivasan from Baltimore.