Why do Americans want guns? It comes down to one word.

At the Nation’s Gun Show in Chantilly, spirits seemed high. People wandered from booth to booth, and the scent of popcorn filled the air. It could have been mistaken for a state fair or weekend flea market were it not for the rows of weapons and accessories — gun parts, AR build kits and body armor — laid out on every surface. It was easy to overlook the one common emotion underlying the event: fear.

Here were weekend shoppers intently inspecting tools of death: moms testing the heft of handguns and fathers stocking up on ammo. When I asked attendees and sellers what gun ownership meant to them, most replied with the same word: “protection.”

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