Eyes in the sky: Gathering evidence with drones

Sometimes the capturing of an image or a single video can have a transformative effect. George Floyd's killing is an example. The eight-minute, 46-second video speaks for itself. That is why it sent so many Americans onto the streets. And anyone contending with state violence, whether they are in Minneapolis, Hong Kong or the Middle East, knows that sometimes all they need to prove their point - to expose illegality - is the right picture.