Sandy Hook, Charlie Hebdo, San Bernardino, the Paris Attacks, Brussels, Istanbul. Virtually all of these terrorist attacks and mass shootings occurred in what are known as “soft target” locations: big spaces with multiple entries and exits, lots of people, and relatively little protection.
Soft targets like airports often contain more stringent security inside, but those security checkpoints, scanners and pat-downs you endure at the TSA are intended to protect the airplanes and their passengers. The rest of the airport terminal generally does not enjoy the same level of security.
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