A growing number of historically Black colleges and universities have had to lock down or postpone classes due to bomb threats on the first day of Black History Month. At least 14 HBCUs reported bomb threats Tuesday. At least one of them, Howard University, also received a bomb threat Monday. "We've had these challenges before," Howard University President Wayne Frederick said Tuesday. But "since I've been here (as a student) in 1988, it has not been this widespread and also, I think, this overt." See article for locations.