IMHO, the lib dem MSM either under reports these stories or totally ignores them because they undermine & disprove the anti-gun agenda of the lib dems.
http://www.breitbart.com/big-government/2015/12/09/2nd-amendment-in-action-armed-driver-stops-attempted-mass-shooting/
2nd Amendment in Action: Armed Driver Stops Attempted Mass Shooting
by AWR Hawkins 9 Dec 2015
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http://www.breitbart.com/big-government/2015/12/09/2nd-amendment-in-action-armed-driver-stops-attempted-mass-shooting/
2nd Amendment in Action: Armed Driver Stops Attempted Mass Shooting
by AWR Hawkins 9 Dec 2015
Read the replies