Russian President Vladimir Putin (R) is seen on board a C-Explorer 3.11 submersible to explore the Shchuka-class submarine Shch-308 that sank during World War II at the bottom of the Gulf of Finland, July 27 2019. It's said the submarine was struck by a German made torpedo in the Baltic waters between Finland and Sweden before it sank. [Photo: IC]"

Russian President Vladimir Putin (R) is seen on board a C-Explorer 3.11 submersible to explore the Shchuka-class submarine Shch-308 that sank during World War II at the bottom of the Gulf of Finland, July 27 2019. It's said the submarine was struck by a German made torpedo in the Baltic waters between Finland and Sweden before it sank. [Photo: IC]"

Russian President Vladimir Putin (M) is seen on board a C-Explorer 3.11 submersible to explore the Shchuka-class submarine Shch-308 that sank during World War II at the bottom of the Gulf of Finland, July 27 2019. It's said the submarine was struck by a German made torpedo in the Baltic waters between Finland and Sweden before it sank. [Photo: IC]"

Russian President Vladimir Putin (front) after diving to the bottom of the Gulf of Finland aboard a C-Explorer 3.11 submersible to explore the Shchuka-class submarine Shch-308 that sank during World War II, July 27 2019. All 40 people who were aboard the submarine died when it sank. [Photo: IC]"