Michelle Obama, First Lady of the United States, presents and announces the opening of the Special Olympics World Games at the Memorial Coliseum, in Los Angeles, the United States, July 25, 2015. The 2015 Special Olympics World Games gathers over 6,500 athletes from 165 countries and regions, taking part in 25 events, and lasts from July 25 to August 2.(Xinhua/Zhang Chaoqun)