Piecing together information from secret sources and a two-hundred-year evolution of the White House, investigative journalists and government insiders weigh in on the mystery of an unusual white box and a top-secret construction project dubbed the "Big Dig" that took place outside of the West Wing...
On September 11, 1941, the U.S. War Department broke ground on a new headquarters that would rise to become the ultimate symbol of the American military. Sixty years after construction began, a hijacked airliner crashed into the building.
