Britain's Prince Harry rubs his eye after a cold chamber training exercise with the Walking with the Wounded South Pole Allied Challenge 2013 British team at Nuneaton in central England September 17, 2013. Three teams of wounded service personnel from Britain, The United States of America and the Commonwealth will race 335km to the South Pole in November. REUTERS/Darren Staples (BRITAIN - Tags: MILITARY SOCIETY ROYALS)