File:Submarine taking Mail (subscriptions to Victory Bonds) through Panama Canal in Catun Locks May 1919.jpg
![File:Submarine taking Mail (subscriptions to Victory Bonds) through Panama Canal in Catun Locks May 1919.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Submarine_taking_Mail_%28subscriptions_to_Victory_Bonds%29_through_Panama_Canal_in_Catun_Locks_May_1919.jpg/736px-Submarine_taking_Mail_%28subscriptions_to_Victory_Bonds%29_through_Panama_Canal_in_Catun_Locks_May_1919.jpg?20200517222039)
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