lot of frustration. you can book free of charge even if you think you are going to be impacted by this. john, we have not seen cancellation numbers since the big ice storm that hit texas this time last year. >> look, what you're telling me it's the worst travel day, the highest cancellations this year. we had so many the last month. people need to brace themselves for the next 24, 48 hours might look like. keep us appreciated. really were appreciate it. this morning, the fbi is investigating this wave of bomb threats at historically black mess colleges. cnn's joe johns has been covering this from the beginning and joins us live. what are the latest developments? >> reporter: john, we have learned a few things from investigators. they have identified some people suspected of making the bomb threats to all the hbcus. that's important because of the