People watch as a drone, of US company Zipline, takes-off from an operations center in Muhanda, Rwanda October 12, 2016, on its way to deliver blood supplies to remote hospitals. Picture taken October 12, 2016. REUTERS/James Akena

People watch as a drone, of US company Zipline, takes-off from an operations center in Muhanda, Rwanda October 12, 2016, on its way to deliver blood supplies to remote hospitals. Picture taken October 12, 2016. REUTERS/James Akena

A Zipline drone takes-off from an operations center in Muhanda, Rwanda October 12, 2016.

2CKFFJM People watch as a drone, of US company Zipline, takes-off from an operations center in Muhanda, Rwanda October 12, 2016, on its way to deliver blood supplies to remote hospitals. Picture taken October 12, 2016. REUTERS/James Akena