I "know" somebody thats been in for 4 years and has never been tested. And I also "know" a guy that it was obvious that he was on, but they were too lazy to do anything about it. From what I understand, they have tested , but unless you're 5' 10" and 250 lb. they won't bother. Anyways, when you're fightin' in Iraq next year, they won't care what you're on. Have fun.