How Concerned Is U.S. Over Paris Shootings?

The transcript discusses the US response to a terrorist attack in Paris, highlighting the concerns of national security advisers and the alliance between the US and France. It speculates on the involvement of ISIS fighters and the potential threats they pose. The White House and Department of Homeland Security are monitoring the situation, but no immediate threat level elevation is planned. The intelligence community is closely coordinating with international partners to address concerns about foreign fighters and potential attacks.

How is the intelligence community responding to the threat posed by the Islamic State?

What does the term 'foreign fighters' refer to in the context of the text?