Sudanese marathon runner Guor Marial smiles as he arrives at the Heathrow airport, in London on August 3, 2012, on day 7 of the London 2012 olympic games. (credit: Andrew Cowie/GettyImages)

Sudan Refugee Running Without A Country At Olympics

When Guor Marial was 8, he sprinted through the darkness with the hope of escaping child slavery at a labor camp in Sudan.