A two - time silver medallist at the IAAF World Cross Country Championships , he made his marathon debut in 2005 .
A two - time silver medallist at the IAAF World Cross Country Championships , he had his first major victory at the Chicago Marathon in 2007 .
A two - time silver medallist at the IAAF World Cross Country Championships , he made his marathon debut in 2005 and had his first major victory at the Chicago Marathon in 2007 .