An armed bystander stopped a mass shooting at an In-N-Out, likely saving lives.

• A man pulled into an In-N-Out for lunch and realized a shooting was underway.
• He fought back, firing at the gunman and keeping him pinned down.
• His return fire held the attacker off long enough to prevent more deaths.
• Many more people could have been killed without his response.

Outlook: The case adds to the ongoing debate over armed civilians stopping active shooters.