Former Australian prime minister Malcolm Turnbull, who banned China’s Huawei Technologies from providing equipment for his country’s 5G wireless networks, says Canadians should ask themselves a question as they ponder whether to do the same: are they comfortable with leaving a vital piece of infrastructure vulnerable to the Chinese government? A decision on whether to formally ban Shenzhen-based Huawei from Canada’s 5G networks – and presumably from successor networks still in development, such as 6G – is expected soon from Prime Minister Justin Trudeau’s government. Mr. Turnbull, who was attending the Halifax International Security Forum on Saturday, said in an…