The US Navy is outfitting a pair of its submarines with new technologies that will improve its sonar and cut back on the noise of the boat's nuclear-powered steam generator.

Remember, when in a submarine one must think up and down as well as left and right. Sonar technicians are able to look at the sound waves and identify their source with extreme accuracy.

Over eight decades ago, the US Navy made the historic capture of a Nazi U-boat during World War II. A treasure trove of vital German intelligence, the submarine's capture was top-secret ... but the ...