Airship of Dreams: Lighter-Than-Air Travel Is Back - Popular Mechanics

With technology borrowed from submarines, a scrappy California company is attempting to resurrect a century-long dream of building huge airships to carry freight—and people—across the skies.

http://www.popularmechanics.com/technology/aviation/airships/airship-of-dreams-lighter-than-air-travel-is-back-16292687