The world's most powerful diplomat arrives at the world's biggest gathering of political and business leaders. Condoleezza Rice came to formally open the annual gathering at Davos in Switzerland with global financial markets falling again after a turbulent week driven down by fear of recession. The ailing US economy may be dominating talk amongst delegates at the World Economic Forum but it will not derail her agenda - private meetings with the presidents of Pakistan and Afghanistan. But criticism of the U.S. central bank is mounting. Morgan Stanley's Asian chief, Stephen Roach, told Reuters 'Davos Today' programme, 'the Fed was storing up more problems'. SOUNDBITE: Stephen Roach, Morgan Stanley saying (English): "I'm sort of worried all they did yesterday was hit the snooze but and they are going to go back to sleep because they are going back to the same old story that we have had to put up with for the last seven years and that is excessive monetary accommodation that takes...