Two members of the U.S. military were shot dead on Saturday inside the heavily barricaded Interior Ministry in the centre of the Afghan capital, Afghan security sources said, as anti-Western protests raged for a fifth day across the country. It was not immediately clear who killed the Americans, said one Afghan security source. They were gunned down during a scuffle, another source said. "American and Afghan troops were present at the time of the shootout, but we are unsure who killed them," a senior Afghan security source told Reuters on condition of anonymity. A spokesman for NATO's International Security Assistance...