Northrop Grumman B-2 Spirit is an American heavy bomber. The cost of each aircraft averaged US$737 million in 1997 dollars ($1.01 billion today).
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The Pancor Corporation Jackhammer is a 12-gauge, gas-operated automatic shotgun. It is one of very few fully automatic shotguns, and although patented in 1987, it never entered full-scale production.
A railway gun is a large artillery piece, often surplus naval ordnance, mounted on, transported by and fired from a specially-designed railway wagon. Many countries have built railway guns, but the best known are the large Krupp-built pieces used by Germany in World War I and World War II.