also alerted the city's health department to call up d.c.-area hospitals to prepare for a mass casualty event. empty your emergency rooms, he said. stock up your blood banks. donnell harvin joins me now. it's good to see you, sir. >> thank you, sir. >> what did you know? >> well, it's not what we knew. it's the threat picture that we had seen. and so leading up to january 6th we started seeing a lot of concerning information surrounding the events that were planned. information from particular actors that we hadn't seen before, specifically looking at what we call ttps, tactics, techniques and procedures that indicated they would be intent on performing acts of violence interpersonal violence and possibly even smuggling weapons into the district. >> so how come we weren't more prepared? >> well, you know, like you and other americans, i'm looking