What Am I Riddles

Question: What has to be broken before you can use it?

Question: You may always chase me but you are always about 3 miles away.

What am I?

Question: It turns into a different story.

What is it?

Question: A trail, a union, together tied.
Come across me and you will find,
you cannot change the course I'm on,
without me you cannot travel on.

What am I?

Question: What has a foot but no leg?