The USS San Francisco (SSN-711) at sea (@ Steve Kaufman/Corbis)
comments,
- The first submersibles were propelled by oars.""This one\s a little more high-tech
- Five U.S. military branches serve our country on land, at sea, and in the air.""Today\s observance celebrates them all
- No denying, spending long periods of time under the sea can be challenging.""How do submariners do it?
- Why power a sub with a nuclear reactor?""What a great subject for a documentary...
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