By Julia Harte and Brendan O’Brien (Reuters) -At least a dozen historically Black colleges and universities in the United States received bomb threats and put their campuses on lockdown on Tuesday, a day after a rash of similar threats forced the cancellation of classes at other schools. The threats against the schools in cities from Baltimore to New Orleans came on the first day of Black History Month in the United States. “We don’t think it’s by coincidence that we received this particular threat at this particular time,” said A. Zachary Faison, Jr., the president of Florida’s Edward Waters …