Canada Post is refusing to collect firearms that were banned by the federal government in 2020, complicating Ottawa's plans for a buyback program to remove 144,000 firearms from private hands, federal sources say. The Crown corporation informed the government of its position in a recent letter. It said its decision was based on concerns about its employees' security, according to federal sources who were not authorized to discuss the matter publicly. One key source of concern being cited by Canada Post is the possibility of staff conflicts with gun owners who have been asked to give up their so-called "assault"...