Iranian President Mahmoud Ahmadinejad arrives to hold a press conference in Tehran on May 25, 2009. Ahmadinejad ruled out any talks with world powers on Tehran's nuclear drive, but said he was open to a debate with US President Barack Obama. Getty Images logo Getty Images 8 months ago

Iranian President Mahmoud Ahmadinejad arrives to hold a press conference in Tehran on May 25, 2009. Ahmadinejad ruled out any talks with world powers on Tehran's nuclear drive, but said he was open to a debate with US President Barack Obama.