As wars rage in the Middle East and in Europe, a new technology arms race has emerged in drone technology. Primarily developed for surveillance and intel purposes, drones are now increasingly being used to carry out precise and lethal attacks. But how does drone warfare work? And how far will the technology go? In this week’s Security Brief, former senior British officer and assault helicopter pilot Mikey Kay, talks us through the use of drones in modern warfare – and how forces around the world are defending against them.