Answer:
Although glory but not at my best. Power will fall to me when the man who made me dies.
I save lives on the ground and in the air
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves everyday
I have a name that's not mine and no one cares about me in their prime. People cry at my sight and lie by me all day and night.
I am bought by the yard but worn by the foot
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk