This is the first time that I have heard about the "drug charges" against Bush. I will verify the about claim about drug testing in the USAF Reserves.
I was a Med Lab Tech in the USAF Reserves from 1975 until 1980. I performed hundreds if not thousands of pilot flight physicals in that time period. Drug Testing was not on the slate of annual testing for pilots and anyone else for that matter. The only time that drug testing was done was if a doctor or a commander was suspicious of drug abuse.