Presidential Metro

The  is a network of metro tunnels that is added to Fallout 3 in the Broken Steel add-on.

Layout
It connects the Presidential Sub Level beneath the White House with Adams Air Force Base and The Capitol Building's East Wing. Protected and maintained by a computer system called M.A.R.Go.T., the area is guarded by Sentry Bots and swarming with ghouls.

Unmarked quest: Fatal Attraction
A holo-tape titled "Sorry, My Darling".

Notable loot

 * Nuka-Cola Quantum in the Equipment Room, which connects the western and eastern lines.

Appearances
The appears in the Fallout 3 add-on Broken Steel.