yes
Military I.D
Yes, you can use your employment authorization card as a form of identification to fly within the United States.
Military Identification. In the US military ID consists of both the pertinent military ID card, and the service member's dog tags.
You do not. Obtaining or possessing an illegal federal ID is a crime. The only legal means of obtaining a military ID without serving in the military would be to become a military dependent.
I don't believe so. The states I'm familiar with want some form of state issued ID so that they can determine that you are, in fact, a legal resident of the state.
No. The military does not have to follow the Equal Employment Act but has equivalent regulations.
does my military ID work for reentry into the us from mexico?
Yes, a valid US Military ID card will get you on a flight.
The same place where you renew your military ID card in PittsburghPA.
http://www.irs.gov/file/article/0,,id=111163,00.html
So long as your job doesn't involve driving, you can present a valid form of ID, and you can find transport to and from work, yes.
No