Who smokes weed? Young people. Who joins military? Young people. Weed has been an issue for decades.
I know some folks in law enforcement. They all experimented with weed during their high school and college days. The real question was “when was the last time you smoked weed? If they were truthful (based on the lie detector test they performed as part of the pre-screening process) then it wasn’t an issue. If the person had done it recently.. then it was an issue. Granted.. I realize LENF and the military aren’t the same but if they want recruits.. some issues have to be “forgiven”.