I was in Drug and Alcohol Control Program where we conducted random urinalysis in 1980. I don't think it was totally new then.
I remember being drug tested circa 1977-1978 for the first time.
Not sure of exact year, just remember where I was stationed.
I was reporting what William Campenni said on Fox News about what the screenings of Guard at that time were designed to do.
If you have information that the National Guard had instituted drug testing in 1972, let's see it. I have no idea, but I'll trust Campenni who was actually there at the base in that timeframe.
Anecdotal evidence of others' experiences later in that decade are irrelevant.
I might add, I don't think for one minute Bush would have failed such a test had they done screening at that time.