Answer:
I save lives on the ground and in the air. What am I?
Without a bridle or a saddle across a thing I ride a-straddle. And those I ride by help of me though almost blind are made to see.
You turn me over after you have travelled far.
They are many and one, they wave and they drum, used to cover a stare, they go with you everywhere.
You can catch me but cannot throw me.
I am your mother's brother's only brother in law. Who am I?