 And I think if there are a large number of these signatories to any letter or significant senators, let's say, coming forward en masse, that might be a reason for Joe Biden to think again. The military leaders of Mali, Burkina Faso and Niger are due to hold their first summit since seizing power in their respective countries. They're scheduled to meet in Niger's capital, Niamey, to officially launch a new grouping. Richard Cago reports.