A new book by Johnnie Moore reminds us why we should be concerned about the possibility that agents of ISIS will strike America. The title of his book explains his concern: Defying ISIS: Preserving Christianity in the Place of Its Birth and in Your Own Backyard. He not only documents the unspeakable terror at the hands of ISIS, but also explains how ISIS uses the Internet to recruit and train potential terrorists that don’t even have to leave their home country.

His warnings might have been easy to shrug off a few weeks ago. But the terror attack in Garland, Texas got our attention. Two jihadists opened fire at an event sponsored by the American Freedom Defense Initiative. Pamela Geller and Geert Wilders were two of the speakers at the Muhammad Art Exhibit and Cartoon Contest. Fortunately, the Garland police killed the two jihadists. Otherwise, we might have had a scene similar to the jihadist attack of Charlie Hebdo in Paris.

We can have a debate about whether they were truly members of ISIS. But it is not like ISIS gives out membership cards to anyone who believes their terrorist rhetoric. They were certainly followers of the Islamic State.

This fits with the observation made recently by FBI Director James Comey. Earlier this year he was speaking to the National Association of Attorneys General. He explained: “We have investigations of people in various stages of radicalizing in all 50 states.” He also added: “This isn’t a New York phenomenon or a Washington phenomenon. This is all 50 states and in ways that are very hard to see.”

On my radio program, Johnnie Moore revealed how effective ISIS has become. They are using the most sophisticated technological tools and have figured out ways that a few individuals can disrupt whole countries. The most chilling realization can be found in the subtitle: ISIS is in our backyard. It is time for Americans to wake up and demand immediate action from our government.