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Gen. Jack Keane said the terror attack in Manhattan Tuesday shows that radical Islam is "thriving and growing."

An ISIS sympathizer yelled "Allahu Akbar" and ran a truck into bikers and pedestrians on Tuesday afternoon near lower Manhattan's West Side Highway, killing 8 and injuring at least 11.

Keane speculated that Sayfullo Habibullaevic Saipov, 29, was in regular communication with ISIS at least on the internet before he attacked. The general reminded that the internet is now one of the main ways ISIS recruits.

Gov. Cuomo called the tragedy a lone-wolf attack, but Keane dismissed that statement, saying it makes"absolutely no sense whatsoever."

"This individual has committed himself to the ideology of a worldwide terrorist organization called ISIS," Keane stated.

"He is anything but a lone wolf, and we have got to stop using that language."

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