(LtoR) US Kyle Clemons, US Calvin Smith, US David Verburg and US Kind Butler III  celebrate winning in the Men 4 x 400 m relay Final event at the IAAF World Indoor Athletics Championships in the Ergo Arena in the Polish coastal town of Sopot, on March 9, 2014.   AFP PHOTO / ADRIAN DENNIS        (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)