5 U.S. Navy Ships Named After American Presidents
The United States Navy has a tradition of naming many of its popular ships after U.S. presidents. Here are five that stand ...
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How the Navy built 'Sealabs' on the ocean floor in the 1960s (Part 1)
In the 1960s, the U.S. Navy was exploring the other "final frontier" -- the sea. A series of underwater habitats called "Sealabs" were constructed for scientific exploration on the ocean floor.