Capitol politicians and press used as human shields against arial attack

Probably not a bad use for them, but IF our nations capitol WAS being attacked by a Cessna wouldnt the safest place be INSIDE? I remember the damage that kid did in Florida when he flew his small plane into an office building- it broke some windows and set fire to an office.
Could a cessna carry much in the way of explosives? If it contained a dirty bomb, or a biological weapon wouldnt you be better off inside?
