Is Chad the next candidate for upheaval in the Sahel? The Central African country looks more stable than Mali, Niger or Burkina Faso. Chad is an important Western ally in a volatile region where Russia has been expanding in its neighbours Libya, Sudan and the Central African Republic and also a key humanitarian hub as some half a million refugees have fled civil war in Sudan. But military president Mahamat Deby has been cracking down on the opposition and delaying elections. He has come also under criticism for working closely with France. So how stable is Chad?