as someone who also have a company specialized in drones, there are plenty of reasons why would you fly only at night beside isr/s&r, however, he did answer himself later when he said that multi-rotor drones have little endurance (battery), yet these drones are staying for plenty of times, they are definitely launched from the us that's for sure, but i think the whole drone thing is a distraction and had nothing to do with anything else, some sort of social engineering experiment to distract or prep people for something
Canada