Like so many of the Nazis’ weapon designs, the Gustav gun was fantastically expensive and completely impractical.

Both China and North Korea, which pose threats to Japan, have claimed to have tested and deployed hypersonic missiles.

The Japanese navy could be one of the first in the world to operate the advanced air defence system after recent sea trial.

The accompanying engraving represents an improved ten barreled gun, recently manufactured at Colt's Armory, Hartford, Conn., under the supervision of R. J. Gatling, the inventor. In this new gun ...