Nearly two years after being driven from its stronghold in Yemen, one of al Qaeda’s most dangerous franchises has entrenched itself in the country’s hinterlands as a devastating war creates the conditions for its comeback. The danger of another attack hasn’t diminished, said Hans-Jakob Schindler, senior director at the Counter Extremism Project and former head of the United Nations al Qaeda monitoring team. “Al Qaeda is allowed enough breathing space to pose an international threat, and as long as there is no stable settlement in the main conflict, there is no way that is going to change,” he said.