World Bank chief Robert Zoellick on currency tension

The shaky state of the US recovery will be a major concern in Washington this weekend as the IMF and World Bank hold their twice yearly meeting.

The ongoing war of words between the world's top economies over currencies has dominated the agenda in the run up to the conference.

World Bank chief Robert Zoellick has been speaking to the BBC's Andrew Walker. He warns of the dangers of what he calls "beggar thy neighbour" policies with countries trying to keep their currencies weak to protect their own exports.