http://www.wsbtv.com/news/news/local/police-man-shoots-armed-robbers-sonic-drive-thru/njrJk/
Why is this significant?
Well, Sonic decided to go gun-free in 2014:
Sonic-Drive-In and Chili’s Bar & Grill both issued statements asking diners to refrain from bringing concealed weapons into their restaurants, even if they have a permit, NBC News reported Friday.
Sonic Vice President of Public Relations Patrick Lenow told the news agency in an email that while the drive-in chain respected current gun laws, certain actions led to new consideration for their restaurants’ policies.
“While we historically have relied upon local laws to guide how we address the display of guns at drive-ins, recent actions required we carefully reconsider this approach. We’ve considered the views and desires of our customers and employees that staff the drive-ins across the country. Accordingly, we’re asking that customers refrain from bringing guns onto our patios or into our indoor dining areas. With respect to the storage of guns in vehicles, we ask that our customers continue to honor local laws,” he said.
http://www.washingtontimes.com/news/2014/may/31/chilis-sonic-drive-tell-gun-owners-leave-firearms-/
Gun Free Zones like Sonic are Security Theater, no more, no less.