Former Iranian President Akbar Hashemi Rafsanjani accuses the country's leadership of ignorance after he is barred from running for office, say reports.
Developing countries are trying to stop mining companies shifting billions of dollars in profits out of their countries, depriving them of much-needed tax revenue.
US President Barack Obama is heckled over his failure to close the Guantanamo Bay prison by a member of the audience during a national security speech.