Team Poland claims title of men's 4x400m relay at IAAF World Indoor Championships

(From L to R) Team Poland's Karol Zalewski, Rafal Omelko, Lukasz Krawczuk and Jakub Krzewina pose beside the clock showing a new world indoor record time after winning the men's 4x400m relay final during the IAAF World Indoor Championships at Arena Birmingham in Birmingham, Britain on March 4, 2018. (Xinhua/Han Yan)