Brazilian Army soldiers patrol outside Rio Centro where "Rio +20" United Nations Conference on Sustainable Development will be held in Rio de Janeiro

 
Brazilian Army soldiers patrol outside Rio Centro where "Rio +20" United Nations Conference on Sustainable Development will be held in Rio de Janeiro
Brazilian Army soldiers patrol outside the Rio Centro where the "Rio +20" United Nations Conference on Sustainable Development will be held in Rio de Janeiro June 12, 2012. The Rio+20 United Nations sustainable development summit will be held from June 20 to 22. REUTERS/ Ricardo Moraes(BRAZIL - Tags: ENVIRONMENT POLITICS)