Inside America's Armageddon bunkers: Pictures show the once secret doomsday hideouts built to withstand a nuclear apocalypse
- Though officials keep the details of the country's post-doomsday planning classified, evidence is in plain sight
- In Washington terminology, it's known as 'continuity of government,' or COG - and meant to keep US working
- It was first developed during the Truman Administration, in the early days of nuclear weapons development
These astonishing images offer a glimpse inside the bunkers built by the United States government that were designed to withstand a nuclear war.
Though officials keep the details of the country's post-doomsday planning classified, evidence of their decades-long effort - some abandoned, some active - are hidden in plain sight around Washington DC, and beyond.
In Washington terminology, it's known as 'continuity of government,' or COG - and it's meant to ensure that America continues to operate as a constitutional democracy with its 'leadership visible to the nation' and its military able to defend the US 'against all enemies, foreign and domestic.'
It was first developed during the Truman Administration, in the early days of nuclear weapons development. COG measures expanded greatly during the Cold War.
The US government built secret doomsday bunkers for federal employees in Virginia, West Virginia, and Pennsylvania.
They constructed nuclear-hardened communications towers throughout the Washington region, so the White House could reach other top-level survivors.
And they also developed weaponry with 'second-strike capability' that would launch post-doomsday to prevent further attacks, a strategy known as mutually assured destruction, or MAD.