Name: Are mass shootings in the US on the rise? A look at the numbers
Uploaded: Thu Dec 03 2015 12:47:00 GMT+0000 (UTC)
Duration: 3 min 32 s
Description: The attack on a holiday party in San Bernardino is the deadliest mass shooting here in the U.S. since the Sandy Hook Elementary School shooting three years ago. Unfortunately, it's far from the only mass shooting that has happened in recent months. NBC’s Tom Costello reports for TODAY.

Dec. 3, 201503:32