The Russian invasion of Ukraine in February 2022 came as a rude awakening for Sweden. Across the country people suddenly realised that national security vulnerabilities were everywhere. The entire public transit rail network in Stockholm, for example, is operated by MTR, a Hong Kong-based company with ties to the Chinese Communist party. In the event of Stockholm being attacked by foreign forces, most of the detail about critical infrastructure and tunnels running under the city centre – home to the Swedish parliament, the prime minister’s residence, the state department, the…