Bravery comes in many guises, but in those whose work demands courage on a near-daily basis, it often takes the form of a certain studied nonchalance. Lasha Bluashvili, who makes his living clearing landmines, is a case in point. He would rather go to the trouble of making me a cup of tea – here in the Judean desert, the kettle stands on a gas canister inside an old oil drum – than talk of what I regard as his everyday heroism.