A 1969 plan to build a second, nuke-proof Manhattan below New York City

Every now and again we encounter a retrofuturistic urban planning proposal that is equal parts whimsical and hilarious, such as the proposed million-person city spanning from New York to San Francisco. Here's something that eclipses that design in terms of comic impracticality. Behold Oscar Newman's 1969 plan to… »12/20/11 3:25pm12/20/11 3:25pm