Barack Obama calls for urgent eurozone debt deal

US President Barack Obama has warned there is still work to be done on how the eurozone can end a financial crisis that threatens to engulf the world.

Speaking on Thursday ahead of the opening of the G20 summit in France, he said that the most important topic on the agenda was Europe's problems.

Eurozone leaders wanted to present the G20 with a clear action plan, but Greece has thrown this into disarray.

Stephanie Flanders reports.