The deserts of North Africa are a new front in the global "war on terror". Islamic extremists, loosely affiliated to al-Qa'ida, are attacking Western interests. The legacy of years of horrifying sectarian bloodletting in Algeria has led to an "arc of insecurity" stretching from Senegal to Somalia, with some of the fiercest action in Algeria and Mali. Rarely has a nation's suffering been so under-reported. More than 150,000 people have been killed...