(From left to right) Sprinter Nathaneel Mitchell-Blake of Britain, Javelin Thrower Thomas Rohler of Germany, High jumper Mutaz Barshim of Qatar, Pole vaulter Katerina Stefanid of Greece, Qatar Athletics Federation President Thani Abdulrahman Al Kuwari, Triple Jumper Christian Taylor of the United States, Middle-distance runner Hellen Obiri of Kenya, Geoff Gardner of IAAF Council Member and middle distance runner Jennifer Simpson of the United States pose for pictures after the press conference for the 2018 IAAF Diamond League in Doha, capital of Qatar, May 3, 2018.(Xinhua/Nikku)