 The charity is working with a US medical centre to take soldiers over to the States for treatment. Our correspondent Helena Humphrey went to meet some of them. Keep your head up. With every tentative step on his new prosthetic legs, you can see Oleg grow in confidence, remembering who he was before the war. His new legs, made of shiny metal, attach just below his hips. On the battlefield of Bakhmut in eastern Ukraine, he lost nearly his entire lower body, a memory that stays with him.