The Economic Times

In March 1945, USS Trigger sank in the East China Sea; 81 years later, restoration work on USS Silversides uncovered a flood valve that appears to connect the surviving boat to its lost sister

Historic submarine restoration has uncovered a remarkable World War II mystery. Workers found a flood valve stamped with the name USS Trigger, a sister submarine that sank in the East China Sea on March 28, 1945. The valve was discovered inside USS Silversides during its $3.5 million restoration in Wisconsin. How it got there remains unknown, creating a rare physical link between two lost wartime stories.