A massive map provides an overview of the Pentagon highway network. With a complex housing roughly 23,000 workers and 16 parking lots for over 8,000 cars, new roads to accommodate the traffic were a necessary part of the construction. Building the pentagon, 1941.
Photos -- most of which never ran in LIFE magazine -- of the colossal Pentagon under construction more than seven decades ago.
Building the Pentagon, 1940s | Building the Pentagon: Rare Photos | LIFE.com
Margaret Bourke-White, 27, stands on the scaffolding enclosing the under-construction Chrysler Building in New York, 1931.