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While sitting in traffic on the way to work, Mark Hanna, an emergency pediatrician at Maimonides Medical Center in New York, watched as cars blocked the path of an ambulance on a choked-up Brooklyn street.

Hanna, a self-proclaimed drone nerd, thought to himself: is there any way an airborne, medicine-carrying device could reach a patient faster than an ambulance on wheels? So, he looked into the response times of ambulances in the crowded NYC borough. Then,