Pakistan bombed major cities in Afghanistan, including the capital Kabul, on Friday, with Islamabad’s defence minister declaring the neighbours at “open war” following months of tit-for-tat clashes. AFP journalists in Kabul and Kandahar heard blasts and jets overhead until dawn, as Pakistan launched air strikes on the Afghan capital and the southern power base of the Taliban authorities. Pakistan’s latest operation came after Afghan forces attacked Pakistani border troops on Thursday night over earlier air strikes by Islamabad. Relations between the neighbours have plunged in recent months, with land border crossings largely shut since deadly fighting in October that killed more than 70 people on both sides. Islamabad accuses Afghanistan of failing to act against militant groups that c...