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terrorists used vehicles to mow down civilians. secret service has been doing drills with drones. it's a practice. this scenario has a drone overhead that's been weaponized with a chemical agent. you cannot fly drones in d.c. airspace. the secret service has the ability to identify them and bring them down. >> when you look at your spectrum of problems, you don't draw the line of what the last problem was. you have to look beyond that, and we do want personnel to be able to have the aptitude to manage a crisis they haven't seen before. we are not just chasing what we know now. we are trying to look beyond what we know and what we can anticipate. >> they will remain totally focused on the inaugural events and will do so until the final event saturday and then president trump will return to the white house. >> bret: catherine herridge, life at the multiagency command center. thank you. many people who had never

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