US issues first-ever worldwide travel alert as terror threats loom

In the first-ever US worldwide travel alert, the State Department warned Monday that "Current information suggests that ISIL (aka Daesh), Al-Qaeda, Boko Haram and other terrorist groups continue to plan terrorist attacks in multiple regions, "US. citizens should exercise vigilance when in public places or using transportation… Be aware of immediate surroundings and avoid large crowds or crowded places. Exercise particular caution during the holiday season and at holiday festivals or events." The alert is in effect until February 24.    
Brussels remains at the highest alert level due to a "serious and imminent" threat.