Mount Athos, in northern Greece, is the beating heart of the Orthodox Christian faith and home to 2,000 monks. But for the past year, it has also become a place of refuge and pilgrimage for Ukrainian soldiers. For these men, wounded at war and suffering from deep trauma, Mount Athos's retreats offer them a respite from the front lines. The goal is to heal their trauma through faith and soothe their invisible wounds before returning to battle. Eric de Lavarène and Alexandros Kottis report.