Answer:
I save lives on the ground and in the air. What am I?
I am a mountain at night, meadow at day. What am I?
What has to be broken before you can use it?
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
I am enjoyed by some despised by others. Some take me for granted some treasure me like a gift. I last forever unless you break me first.
I build up castles. I tear down mountains. I make some men blind. I help others to see.