Answer:
Everyone has me, but nobody can lose me. What am I?
I start with T end with T and within me is T.
Lighter than feather and softer than silk, yet the strongest man in the world cannot hold me for more than a few minutes. What am I?
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
I save lives on the ground and in the air
The more of me you take, the more I appear behind you. What am I?