An inquiry is due to open in Berlin today into the circumstances surrounding a NATO air strike in Afghanistan in which up to 142 people were killed. Afghan civilians were among the victims of the air strike in Kunduz in early September, which was carried out on the orders of a German commander. Defence Minister Karl-Theodor zu Guttenberg is facing calls to quit. Opponents accuse the German government of a cover-up over the strike on two fuel tankers hijacked by the Taliban. Mr Guttenberg – who held a different post in government at the time of the attack – has described the air strike as the most important event in the military history of post-war Germany. He is under growing pressure from opposition parties to resign over the strike. <br/><br/> <br/>