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BEIJING, CHINA - AUGUST 30: IAAF President Lamine Diack attends the IAAF and Local Organising Committee (LOC) press conference during day nine of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 30, 2015 in Beijing, China. (Photo by Lintao Zhang/Getty Images for IAAF)

BEIJING, CHINA - AUGUST 30:  IAAF President Lamine Diack attends the IAAF and Local Organising Committee (LOC) press conference during day nine of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 30, 2015 in Beijing, China.  (Photo by Lintao Zhang/Getty Images for IAAF)