– The planet Neptune completes its first orbit since it was discovered in 1846. July 14 – South Sudan joins the United Nations as the 193rd member. July 14–23 two frontal systems enter south-central Chile causing great snowfalls that leaves thousand of people isolated. July 20 Goran Hadžić is detained in Serbia, becoming the last of 161 people indicted by the International Criminal Tribunal for the former Yugoslavia. The United Nations declares a famine in southern Somalia, the first in over 30 years. Mauno Koivisto becomes the oldest living President of Finland in the history of the nation, surpassing Kaarlo Juho Ståhlberg. July 21 – Space Shuttle Atlantis lands successfully at Kennedy Space Center after completing STS-135, concluding NASA's Space Shuttle program. July 22 – In Norway, Anders Behring Breivik kills 8 people in a bomb blast which targeted government buildings in central Oslo, then kills 69 at a massacre at a Workers' Youth League camp on the island of Utøya. July 31 – In Thailand over 12.8 million people are affected by severe flooding. The World Bank estimates damages at 1,440 billion baht (US$45 billion). Some areas are still six feet under water, and many factory areas remain closed at the end of the year. 815 people are killed, with 58 of the country's 77 provinces affected. August August – Stock exchanges worldwide suffer heavy losses due to the fears of contagion of the European sovereign debt crisis and the credit rating downgraded as a result of the debt-ceiling crisis of the United States. August 5 NASA announces that its Mars Reconnaissance Orbiter has captured photographic evidence of possible liquid water on Mars during warm seasons. Juno, the first solar-powered spacecraft on a mission to Jupiter, is launched from Cape Canaveral Air Force Station. August 20–28 – Libyan rebels take control of the capital Tripoli, effectively overthrowing the government of Muammar Gaddafi. September September 5 – India and Bangladesh sign a pact to end their 40-year border demarcation dispute. September 9 – October 23 – The 2011 Rugby World Cup is won by New Zealand September 10 – The MV Spice Islander I, carrying at least 800 people, sinks off the coast of Zanzibar, killing 240 people. September 12 – Approximately 100 people die after a petrol pipeline explodes in Nairobi. September 17 – Occupy Wall Street protests begin in the United States. This develops into the Occupy movement