Answer:
It flies when it's on and floats coming off.
It is sometimes known to have silver linings.
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
Though easy to spot, when allowed to plume, It is hard to see, when held in a room.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.