A heavy reckoning: war, medicine and survival in Afghanistan and beyond

What happens when you reach the threshold of life and death - and come back?

As long as humans have lived together on the planet, there have been wars, and injured soldiers and civilians.

But today, as we engage in wars across the globe with increasingly sophisticated technology, we are able to bring people back from ever closer encounters with death.

But how do we do it, and what happens next? Here, historian Emily Mayhew explores the modern reality of medicine and injury in wartime, from the trenches of World War One to the dusty plains of Afghanistan and the rehabilitation wards of Headley Court in Surrey.