National Security Journal on MSN
Russia’s Big Sierra-Class ‘Titanium’ Submarine Mistake Still Stings
Key Points and Summary – The Soviet Sierra class (Projects 945 and 945A) wrapped a modern attack submarine around a titanium ...
Found And Explained on MSN
The Plane That Used Jet Power Before Jet Engines Existed
In 1910, one inventor dared to do the impossible - build a jet-powered plane decades before jet engines existed. His design ...
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