A team of students at the University of Pennsylvania are developing a program of swarming quad rotor helicopters equipped with ground-penetrating radar to detect IED and other hidden dangers. The copters are small enough to fit in the palm of your hand. Illustration by Jeff Koegel, art director Catherine Gontarek. 

A team of students at the University of Pennsylvania are developing a program of swarming quad rotor helicopters equipped with ground-penetrating radar to detect IED and other hidden dangers. The copters are small enough to fit in the palm of your hand. Illustration by Jeff Koegel, art director Catherine Gontarek. 

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