To the ATC/Pilots here... question.
What I find odd is that a clearance to cross an active runway is given on the ground frequency, not tower. Isn't it the case in Canada that Tower has master control of the runway and to request crossing you have to key up Tower? Is this not common place in the USA? Having them on the same frequency as pilots would have allowed the pilots to listen in on activity on the runway and possibly recognize something was amiss and go-around.
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