North Korea says it has tested a new torpedo system that uses artificial intelligence for target detection and guidance. North Korean state media said Friday the weapon was a “super-speed precisely guided” torpedo system named “Zam-2.0.” It didn't explain what was meant by artificial intelligence. South Korea’s military, which often accuses the North of exaggerating its military technologies, did not immediately comment on KCNA’s report. North Korea has been ramping up weapons demonstrations in recent weeks, including conducting its first underwater-launched missile tests in nearly three years, as leader Kim Jong Un shifts his focus to naval capabilities after years of ballistic missile development.