Is the UK the only country with more horses than tanks in its army? And what does the number of tanks say about a country’s capacity to fight?

On the face of it, Eduardo Martins had an inspiring story as a young, conscientious photographer working in conflict zones. His images were used on a number of reputable news sites, and his Instagram following reached into the tens of thousands. But a BBC Brasil investigation has revealed Martins to be a fake identity. Martins – whoever he really is – took another man's self-portraits and passed them off as his own, and stole the work of a real war photographer.

When we meet someone and ask them what do you do – what are we really hoping to find out about that person? David Baker explores how much emphasis we place on our jobs as part of our identity.

(image: Members of the Kings Troop Royal Horse Artillery at Wellington Barracks in London. Credit: Oli Scarff/Getty images)