Walking with the Wounded team member Duncan Slater is embraced by his daughter Lilly on his return to London Heathrow on December 23, 2013. The South Pole allied expedition comprised of three international teams made up of wounded servicemen and women from the UK, the US and the Commonwealth (Australia and Canada) trekking across 335km of the Antarctic Plateau to reach the South Pole in 16 days. By Dan Kitwood/Getty Images