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Six young men, hailing from three different states and all between the ages of 19 and 21, have been accused in a sprawling plot that federal investigators allege includes two thwarted terror plots, one a Halloween mass shooting and the other involving plans to travel to Syria and fight for the Islamic State terror group.

Their alleged plot to join ISIS represents what one immigration expert called a fundamental failure of American assimilation and the speed at which radicalization can happen over the internet.

"Lone wolves have been a problem for decades," said Lora Ries, director of the Heritage Foundation’s Border Security and Immigration Center. "Now we’re also seeing this happen in groups and among young people. Think

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