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DHS assessment: Individuals radicalized once in US

By Tammy Kupperman CNN

WASHINGTON (CNN) -- A recent Department of Homeland Security intelligence assessment found that most foreign-born violent extremists do not arrive in the US radicalized, but become radicalized after living in the US for several years.

Such findings seem to undercut the Trump administration's case for its travel ban and track with other studies, including one by the New America Foundation, that find no clear connection with violent attacks or attempts in the US and travel from certain countries.

Work on the assessment, which was first reported by MSNBC Thursday night and confirmed by a DHS spokesman to CNN Friday morning, began in August. It is based only on "unclassified, open source materials, including a Department of Justice list of unsealed cases. It does not include information from historical or current investigative case data or current intelligence or threat stream data from classified data sets."

DHS said the assessment is "used to inform federal, state, local, tribal, and territorial counterterrorism, law enforcement, and countering violent extremism officials, as well as immigrant screening and vetting officials on trends of foreign-born individuals engaged in terrorism activity in the homeland."

The report examined 88 cases.

CNN has reached out to the White House for comment.

CNN's Theodore Schleifer contributed to this report.

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