Foreign ministers from six key powers meet Tuesday to coordinate their positions on Iran's nuclear program, with France saying it expects quick agreement on a new draft UN resolution to increase pressure on Teheran. But a US official said differences over the issue remain. The meeting at the Foreign Ministry in Berlin brings together the foreign ministers of the five permanent UN Security Council members - the US, Britain, France, Russia and China - plus Germany, as well as European Union foreign policy chief Javier Solana.