Answer:
There are millions of me. I am very small but when moving fast I am deadly.
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
What hangs others yet can unintentionally hang itself?
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
What building has the most stories?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.