So why bring it up if it unless to sow seeds of suspicion? What a vile piece of crap this "reporter" is.
Random drug tests on National Guard units didn't start until the mid 1980's. And they were random, unannounced.
The only time my urine was "tested" was my physical in the late 1980's, and since I had just had major surgery, and had received narcotic pain medications, they decided to omit it.
Scheduled drug testing is ridiculous: You just stay clean for awhile, take a herb to block the THC part of the test, or borrow someone else's urine.
However, pilots do take drug testing. However, Bush's "drug" was alcohol, which clears in 24 hours--which is why alcohol is forbidden up to 24 hours prior to testing.
Drug tests for meth and cocaine were NOT common in the 1970's, and indeed, Amphetemines were not considered "drugs" until truckers wrecked too many trucks from taking Amphetamines to stay awake, again in the early 1970's. So which "drug test" was Bush supposed to have missed?