Answer:
Everyone has me except for a few. You may not be able to identify me but I can always identify you. What am I?
People buy me to eat but never eat me. What am I?
I bring light to a dark world. In a current I travel and through tunnels I am hurled. Touch me and I'll kill you. What am I?
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. What am I?
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.