Interesting short piece on the potential to use "fruit flies" (these would actually be vinegar flies belonging to the family Drosophilidae, true fruit flies belong to the family Tephritidae - IBD needs a better science blurbist) to detect bombs and illicit drugs given that they can detect odor from these materials almost as well as wine odors. 

I can believe it, I've seen work using electrodes on vinegar fly antennae showing highly selective sensitivity to certain volatiles given off from fruit in the air.

http://news.investors.com/101514-721966-bomb-detecting-fruit-flies-.htm?ntt=fruit+fly