Antidoping agency
Sporting leaders back proposals to give more powers to WADA
The IOC wants to give more power to the World Anti-Doping Agency (WADA) to fight against doping.
More than 250 Russian athletes from an original team of 387 have been cleared to compete.
The IAAF voted unanimously to uphold its ban on Russia for systematic doping.
This suspension will be in place until after the 2016 Rio de Janeiro Olympics.
British doctor alleged he had prescribed banned performance-enhancing drugs to 150 sportsmen.
Cyclist Lance Armstrong says he will not be fighting anti-doping accusations