The 2013 IAAF Track & Field World Championships, which will take place in the Russian capital of Moscow from Aug 10 – 18, is set to be the biggest ever IAAF championship. With a total of 1974 athletes having been entered (1106 men and 868 women), the record of participants is also on course to be broken as the previously most attended championships in terms of athletes was Berlin 2009 with 1895. This event airs August 10 @ 3:30pmET.