Korean Central News Agency/Korea News Service via AP
- North Korea claims it tested an underwater drone that can create a radioactive tsunami.
- It said it detonated the drone near a mock port on Thursday and "confirmed its lethal strike capability."
- The announcement on Friday is the first time Pyongyang has publicly mentioned such a weapon.
North Korea claimed on Friday that it tested an underwater nuclear drone that can trigger a "super-scale radioactive tsunami" by exploding in the ocean.