A Taiwanese student experimenting with software-defined radio shut down three bullet trains for nearly an hour, leading to an anti-terrorism response.

A Taiwanese student experimenting with software-defined radio shut down three bullet trains for nearly an hour, leading to an anti-terrorism response.

A 23-year-old in Taiwan exploited TETRA radio flaws unchanged since 2007 to trigger emergency braking on four trains. He faces up to 10 years in prison.