Concerns and controversies at the 2008 Summer Olympics ancient Olympia stadium and interrupted the speech of Liu Qi, head of the Beijing Games committee. One protestor tried to snatch the microphone as another unrolled a black flag showing the Olympic rings as handcuffs. Nearly 50 Tibetan exiles in India began a global torch relay 25 March 2008 with a symbolic "Olympic" flame that ended in Tibet on 8 August 2008, the day of the Summer Games' opening ceremonies in Beijing. Although the torch was heavily guarded by local police and Chinese security agents wearing blue track suits, protesters attempting to stop the relay or take the torch were
2016 Summer Olympics opening ceremony and Gilberto Gil performed the song "Sandália de Prata", by Ary Barroso. The segment was a tribute to Rio's most famous signature event; the Rio Carnival, which happens on the last four days before Ash Wednesday. Ending the Olympic torch relay at the end of the Opening Ceremony, Gustavo Kuerten brought the Olympic torch into the stadium, relayed the Olympic flame to Hortência Marcari, who relayed to Vanderlei Cordeiro de Lima, who then lit the Olympic cauldron. The cauldron was lit by Vanderlei Cordeiro de Lima, marathon bronze medallist at the 2004 Summer Olympics and recipient of Pierre de Coubertin