(130814) -- MOSCOW, Aug. 14, 2013 (Xinhua) -- Lukasz Nowak (R) of Poland catches his breath after the Men's 50 Kilometres Race Walk Final of the 14th IAAF World Athletics Championships Moscow 2013 at Luzhniki Stadium in Moscow, Russia on Aug. 14, 2013. Robert Heffernan of Ireland won the gold medal with 3:37:56. (Xinhua/Li Jundong)