death ray, however, the microwave drill has its weaknesses. For starters, the beam is unable to penetrate steel or sapphire, and there's also the small issue of microwave radiation, which could have some nasty consequences for the poor soul stuck operating the drill. According to the researchers, however, a simple shielding plate should be enough to protect anyone in the vicinity of the monstrosity -- maybe, but are there enough steel plates to protect us all if the device falls into the wrong hands? Like ours?
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