Deminers comb Belgian countryside for remnants of the Great War | AFP

Belgian deminers have been picking up World War I munitions for over a century and believe they still have another century's worth of work. British, German and French shells and munitions are turning up at the surface in Flanders by the thousands every year. Each year, the teams respond to more than 2,000 requests from farmers or construction crews to remove munitions, and have built up an expertise that they share across the world.