A Somali man walks in front of a high-rise apartment building under construction in Mogadishu on Nov. 4. Somalia, along with North Korea, is seen as the most-corrupt country in the world, according to the Corruption Perception Index released today by Transparency International. Farah Abdi Warsameh/AP hide caption

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Aansoo Kohli is running a makeshift class in a cowshed for children who have no access to school. Abdul Sattar for NPR hide caption

itoggle caption Abdul Sattar for NPR

Secretary of State John Kerry and Chinese Foreign Minister Wang Yi meet on the sidelines of the Asia-Pacific Economic Cooperation (APEC) meeting in Beijing on Friday. Beijing and Washington backed an anti-corruption pact. Reuters/Landov hide caption

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Groups of rural and community police arrive in the city of Iguala on Tuesday to help in the search for 43 students who disappeared after a confrontation with local police on Sept. 26. Miguel Tovar/STF/LatinContent/Getty Images hide caption

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Antonio Cavalcante had a candidate for governor successfully barred after proving he had embezzled millions of dollars while he was a state legislator. Lourdes Garcia-Navarro/NPR hide caption

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Supporters of J. Jayalalithaa, chief minister of India's Tamil Nadu state and head of the AIADMK party, hold a protest against a prison sentence for the popular politician in the southern Indian city of Chennai Sunday. BABU/Reuters /Landov hide caption

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"The two armies of corruption and anti-corruption are at a stalemate," China's president, Xi Jinping, reportedly told a closed-door Politburo meeting in late June. Jorge Silva/Reuters/Landov hide caption

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The mask of this Kiev protester (at a 2012 demonstration demanding more funding for HIV treatment) reads "quarantine." There are enough drugs to treat only half the HIV patients in Ukraine. Sergei Supinsky/AFP/Getty Images hide caption

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A young Afghan balloon seller runs toward a customer in Kabul on April 2. Afghanistan, North Korea and Somalia are the most-corrupt countries, according to the annual Corruption Perception Index released Tuesday. Massoud Hossaini/AFP/Getty Images hide caption

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A Mexican attempt to curb bribery among traffic cops turns on the belief that women are less likely to take illicit payments from drivers. A new study suggests that this approach can work, under the right circumstances. iStockphoto.com hide caption

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Even before FIFA President Joseph Blatter announced the 2018 and 2022 World Cup host countries in December, 2010, accusations of corruption were rampant. A panel meant to restore FIFA's image lost a member Monday, as Alexandra Wrage said it was accomplishing nothing. Fabrice Coffrini/AFP/Getty Images hide caption

itoggle caption Fabrice Coffrini/AFP/Getty Images