An armored law enforcement vehicle is seen in the area where a man has reportedly taken people hostage at a synagogue during services that were being streamed live, in Colleyville, Texas, U.S. January 15, 2022. REUTERS/Shelby Tauber The United States faces heightened threats from extremist groups domestic and foreign, underscored by last month’s hostage standoff crisis in a Texas synagogue and bomb threats at many historically Black colleges and universities, a US government agency said on Monday. The warning comes after some schools across the United States cancelled classes and issued shelter-in-place orders last week. Investigators ultimately failed to turn...