1793 - Alexander Mackenzie becomes the first Euro American to cross the country of Canada; from the Atlantic Ocean to Pacific Ocean.
https://m.youtube.com/watch?v=mmKyefaAjrU
1942- Construction begins on the Gato-class submarine, the USS Cod.
https://m.youtube.com/watch?v=DArQjNZNHk0
https://youtu.be/e8EMPjntylk
https://youtu.be/Wvkj5TXeV0I
https://youtu.be/cbvLqlWxpWo
https://youtu.be/kSsJI7y6WpM
https://youtu.be/d5jzRMQNHVA
https://youtu.be/KEYOOE4ERDc