Robert Krulwich got fooled by the above video (actually just an art project). But, he argues, the prospect of employing bees to find illegal plants isn't so unrealistic:

At first I was irritated by being duped by a news-like video. Then, thinking it over, I got the uncomfortable feeling that Waithe's fantasy doesn't seem all that far-fetched. I'm (vaguely) OK with DNA testing, scent-chasing bloodhounds, police-aiding psychics, but somehow, turning social insects into police intelligence units seems just crazy enough, just do-able enough, just attractive enough to the police, that one day we may have to actually cringe when a bee comes wandering through the kitchen window.

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