Story highlights After terror attacks, Brevard County sheriff and others ask citizens to arm themselves

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Melbourne, Florida (CNN) In less than a month, three cities have become synonymous with terror:

That last one was enough to spark a trend of sheriffs around the country calling on citizens to arm themselves.

In Brevard County, Florida -- less than an hour's drive from Disney World -- Sheriff Wayne Ivey was one of the first to post a video on Facebook. In it, his message was clear: "The only thing that stops a bad guy with a gun, is a good guy with a gun."

Though he repeatedly cautioned against vigilante justice, Ivey made sure gun owners knew he wanted them to "proactively engage anyone who threatens harm through terrorism or mass killings."

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