Wave of strikes comes after Taliban forces attack Pakistani border troops following earlier action from IslamabadPakistan has bombed major cities in Afghanistan including the capital, Kabul, with Islamabad’s defence minister declaring that the hostile neighbours were in a state of “open war” as a cycle of retaliatory attacks escalated further.Witnesses in Kabul and Kandahar, the southern Afghan city, reported explosions and jets overhead until dawn, while the Taliban government said later that P...