By SAFIULLAH PADSHAH and ELIAN PELTIER A Pakistani airstrike on a drug rehabilitation center killed dozens of people in Kabul, Afghanistan’s capital, on Monday night, in the deadliest single attack of an escalating conflict between the two neighbors. There were at least 75 bodies in body bags or coffins in the backs of ambulances that shuttled back and forth throughout the night and Tuesday morning. An initial assessment by a United Nations agency at the site said that the death toll could be…
