A plane has crashed in hills north of the Pakistani capital, Islamabad, killing all 152 people on board. The plane, an Airblue flight from Karachi to Islamabad, came down in the Margalla Hills. Officials said the plane lost contact with the control tower minutes before landing. It is not known what caused the crash. Pakistani TV showed images of smouldering wreckage on a foggy hillside, with helicopters overhead. A huge rescue effort was launched, and the army sent special troops to help. The plane, reported to be an Airbus A321 with 146 passengers and six crew on board, is thought...