@CNN: Scientists are trying to solve the mystery of what killed a Civil War submarine crew https://t.co/0tPTwUjfeG https://t.co/ok6ubWtQkO
Scientists are trying to solve the mystery of what killed a Civil War submarine crew https://t.co/0tPTwUjfeG http://pic.twitter.com/ok6ubWtQkO
— CNN (@CNN) August 25, 2017