 The Future for Ukraine Foundation estimates that there may have been up to 100,000 amputations since the start of the full-scale invasion. The charity is working with a U.S. medical center to take soldiers over 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 growing confidence, remembering who he was before the war.