 On 23 November 2007, the IAAF recommended to the IOC Executive Board to disqualify the USA women's 4 × 100 m and 4 × 400 m relay teams after Marion Jones admitted to having taken performance enhancing drugs prior to the Games.On 12 December, the IOC disqualified Jones and stripped her of her relay medals but it did not disqualify the U.S. relay teams.On 10 April 2008, the IOC disqualified both U.S. relay teams and asked for Jones' teammates' medals to be returned.