The International Association of Athletics Federation (IAAF) 2015 World Championship started on 22^nd August in Beijing. Sportsmen from 207 countries are participating in IAAF-2015. Because of the high temperature in Beijing, the male marathon started earlier than planned at the 07:35 am. Mongolian sportsmen B.Ser-Od crossed the finishing line in 2:32:08, coming 38^th place. Mongolian Honorary Sportsmen B.Ser-Od has represented Mongolia many times in the hardest category of the athletics-marathon.  His friends and relatives, including his 65-year-old mother came to Beijing to cheer him on. His team consists of his spouse, coach B.Oyuntuya, and Japanese coach Tadayoshi Kametaka.