LONDON, ENGLAND - MAY 12: Laura Stefan, the anti corruption coordinator for the Romanian Academic Society (L-R) Colombia President Juan Manuel Santos, Sri Lanka President Maithripala Sirisena and business man Strive Masiyiwa take part during a panel discussion at the international anti-corruption summit on May 12, 2016 in London, England. Leaders from many of the worlds nations are gathering in London for the summit, which is aimed at stepping up action to tackle the problem of corruption. (Photo by Frank Augstein - WPA Pool/Getty Images)
