by Geneviève NORMAND BROMONT, Canada (AFP) — In the dark of night, a drone takes off from a Toronto hospital rooftop, the hum of its rotors barely audible over the bustling sounds of the cars and pedestrians below in Canada’s largest metropolis. On its maiden flight, with a bird’s-eye view of the city’s glistening skyline as it glides over apartments, shops and office towers, the drone is carrying a precious cargo — human lungs for […]