" Nothing symbolized the federal government’s wartime work frenzy more than the new Pentagon, the largest office building on earth, situated on the other side of the Potomac River from the White House next to the Arlington National Cemetery. Completed in 1942, it stood five stories high, with 6.5 million square feet of offices, enough space to keep an army of janitors waxing the floors all year long. "

― , The Accidental President: Harry S. Truman and the Four Months That Changed the World