On November 12, President Obama said it was โ€œprematureโ€ to say that ISIS was โ€œthe greatest terror threat in the world.โ€

Since then, four countries have declared a national โ€œstate of emergencyโ€ in response to attacks by ISIS or its affiliates: France, Belgium, Mali, and now Tunisia.

The United States has been in a formal โ€œstate of emergencyโ€ since the 9/11 attacks; the president renews this status every year.