OTTAWA -- Officials from Canada’s cyber-spy agency defended the security of Canada’s telecommunications systems and allowing Huawei Technologies Co. Ltd equipment to operate on them, as MPs pressed whether Canada should follow other Five Eyes allies and restrict the Chinese company’s technology. Communications Security Establishment (CSE) officials insisted Thursday afternoon that taking a "holistic" approach to ensuring security across “heterogeneous networks” is more important than the particular devices vendors are selling, comments that come amid an emerging political...