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" is located up a flight of stairs on a bench near the exit to the capital building east wing. Finding and listening to it will start the unmarked quest Fatal Attraction.

Notable loot

 * A Scoped .44 Magnum in a partially collapsed room to the left off the northeast tunnel.
 * A Power Fist on a skeleton in the irradiated southern end of the eastern tunnels.
 * A number of Sensor Modules and Cameras.
 * A Mini Nuke in one of the abandoned metro cars; you must look at the end of the train, where there is a skeleton inside with a Laser Pistol...going inside may get you trapped, so save before entering this car (you should be able to reach the nuke without entering the car)
 * Various types of ammo.
 * 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.