The Taliban on Tuesday announced a ban on the use of foreign currency in Afghanistan, a move sure to cause further disruption to an economy pushed to the brink of collapset. The surprise move came hours after at least 25 people were killed and more than 50 wounded when gunmen attacked Afghanistan’s biggest military hospital after two heavy explosions at the site in central Kabul. “The economic situation and national interests in the country require that all Afghans use Afghan currency in their every trade,” the Taliban said in a statement. The use of US dollars is widespread at Afghanist...