Former Prime Minister John Howard has spoken out on the need to fast-track visas for Afghan workers who assisted U.S. and allied forces during the Afghanistan War. He made the comments amid growing concerns that thousands of Afghans will face violent retaliation from the Taliban, who are now advancing across the war-torn country. “Where it is clearly the case that they could be in danger of retribution, we have an obligation to help them, if necessary, by giving them visas to come to live in Australia,” Howard told SBS News. “That is a moral obligation we have. It was a moral obligation that we shamefully disregarded many years ago when we pulled out of Vietnam,” he added. “I do not want to see a repetition of that failure in relation to Afghanistan.” Revelations have emerged that one Afghan interpreter was denied a visa to Australia on the grounds that he …