The San Bernardino shooting is the second mass shooting today and the 355th this year

By:  Christopher Ingraham

Authorities in San Bernardino, Calif., saying 14 people were killed and 14 others were injured in a mass shooting on Wednesday at a center for people with developmental disabilities. This is at least the third mass shooting since the rampage in Colorado Springs last Friday.

Here's a look at the year's mass shootings, including today's.

The San Bernardino shooting is the 355th mass shooting this year, according to a mass shooting tracker maintained by the Guns Are Cool subreddit. The Reddit tracker defines mass shootings as incidents in which four or more people, including the gunman, are killed or injured by gunfire.

The Mass Shooting Tracker is different from other shooting databases in that it uses a broader definition of mass shooting — the old FBI definition focused on four or more people killed as part of a single shooting.

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