2012 Summer Olympics in the programme for the first time, and 36 women competed in three weight classes. There was a special dispensation for the shooting events, which would otherwise have been illegal under UK gun law. In tennis, mixed doubles returned to the Olympic programme for the first time since 1924. London's bid featured the same 28 sports that had been included in other recent Summer Olympics, but the IOC voted to drop baseball and softball from the 2012 Games just two days after London had been selected as the host city. There was an appeal, but the IOC voted to uphold
Bids for the 2014 Summer Youth Olympics 2014 host city was elected during the 2010 IOC session in Vancouver, prior to the 2010 Winter Olympics. This was the first election of a Youth Olympic Games host city held in an IOC Session. The elections for the host cities of the 2010 Summer Youth Olympics and 2012 Winter Youth Olympics were done through postal votes by IOC members. China bid for the 2014 Summer Youth Olympics with the city of Nanjing. Nanjing is located in East Central China along the Yangtze River. The IOC noted Nanjing had "the least risk" of the applicant cities. Poznań bid for the