When rebel groups centred in Sudan's Darfur region attacked Chad's capital, Ndajamena, on February 2 it looked as if the long, corrupt and oppressive rule of presidentIdriss Deby (pic) might be ending, but Chad was not so lucky. As a report in the Economist put it, “Chad is one of Africa's poorest and least stable countries and Mr Deby one of the continent's worst presidents.”