Canada says it is investigating how to safeguard the “sensitive skills and information” that members of the military take with them when they retire after reports of former Western fighter pilots selling their knowledge to China prompted Australia to announce a crackdown on unauthorized training of foreign defence forces. Australia announced Thursday penalties of up to 20 years in prison for providing military training or tactics to a foreign military or government body, including hybrid civilian and military organizations or state-owned companies, without authorization from the defence minister. Australia’s “Five Eyes” intelligence partners of Britain, United States, New Zealand and...