INDIGENOUS PEOPLE AT RIO 20 CONF IN BRAZIL. Mayan, Aztec, Brazilian and North American Indians, symbolizing the unity of men, participate in the lighting of the “Holy Pyre” using a traditional method during the Kari-Oca opening ceremony on the sidelines of the Rio 20 UN Environmental Summit on June 13, 2012 in Jacarepagua, Rio de Janeiro, Brazil. The UN Conference on Sustainable Development opened Wed, launching a new round of debate on the future of the planet, its resources and people, 20 years after the first Earth Summit. The Rio 20 conference is attended by close to 50,000 participants including delegates, environmental activists, business leaders and indigenous groups. The event runs through June 22, with three final days of high-profile talks among the 130 global leaders attending. Photo Courtesy Denverpost