![Hhe F-22 was designed in the 1980s to combat ''an enemy which no longer exists.'' F-22 Raptor](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpsKT9h2XWRrSCYEsvgOl4FEjM8UuM5OURNJVgkcR1QosWi2g5JoJPnoaYG1sXWdQ8J7nxrW3LKh9SB_89tRGMeMwaS8P5mjqkDrsaeHhMwCTaP24YofxZYZtDuNsUGlHL-OKL/s144/F-22%252520Raptor.jpg)
Today's new weapons systems are something undreamed of only a few decades ago.
The last of 10 aircraft carriers of the Nimitz class, the George H. W. Bush, now is being completed at Newport News for sea trials.
This leviathan is three football fields long and loaded weighs more than 100,000 tons. It is the most expensive moving structure on the surface of the Earth at a cost of $4.6 billion.
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