When Tomas van Houtryve sent up a drone to photograph US public spaces, it captured a series of haunting images from a new perspective. He speaks to Eve Jackson about the rise of drones both in their military capacity and their growing popularity among civilian photographers, film-makers and law enforcement agencies. They also discuss this week’s outcry about the photo showing a drowned Syrian boy lying face down on the beach in Turkey and the debate about whether to show it or not.