Spoiler: It's the PEOC - the Presidential Emergency Operations Center - better known as "the White House Bunker".
https://en.wikipedia.org/wiki/President ... ons_Center
https://thehill.com/homenews/administra ... y-offices/
The East Wing PEOC isn't the only White House "bunker". The West Wing of the White House has other underground sections, as well as the Situation Room, another control center. There's no doubt tunnels going to the adjacent government buildings as well. At this point, 80 years into the era of nuclear war, I assume that the entire underground volume of Washington DC, plus large chunks of Viriginia and Maryand, is probably just one giant Continuity-of-Government bunker.The East Wing yet again stirred controversy when President Franklin D. Roosevelt added more offices as part of the White House’s growing staff in 1942, the WHHA stated. It also became the home of an underground bunker now referred to as the Presidential Emergency Operations Center. The bunker was used by members of President George W. Bush’s Cabinet following the Sept. 11, 2001, attacks, and by President Trump during the George Floyd protests in 2020.
The controversy stemmed from it being completed with World War II unfolding in the background. Republicans called the construction wasteful and accused FDR of using the White House makeover to improve his image.
“The secretive nature of the construction, tied to military purposes, further fueled suspicions,” the WHHA explained. “However, the East Wing’s utility in supporting the modern presidency eventually quieted critics.”
But it's interesting to see that the new "ballroom" (PEOC) is going to be paid for by a whole bunch of private businesses rather than the US government. Feels like a quiet echo of the under-the-counter William Stephenson-shaped stuff that was happening in 1942 and the years leading up to it.
https://fortune.com/2025/10/26/37-white ... eos-trump/
I wonder what the plan is for emergency White House operations with the PEOC out of commission for several years of rebuild. There have been extensive renovations several times before. Where does the gang go? Site R? Camp David? The Treasury or Eisenhower Executive Office Buildings? An abandoned tollbooth somewhere in the DC subway with racks of screens and weapons that fold out excitingly from hidden panels at the touch of a button? All of the above?
(I'd vote for the tollbooth, so I could go pew! pew! pew! at the crumbling ceiling with a prototype laser pistol while listening to boring National Security Council reports, which is why they should never put me in charge of a superpower.)
Regards, Nate