Presidential Metro

The  is a network of metro tunnels that is added to Fallout 3 in the Broken Steel DLC pack.

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

 * Scoped .44 Magnum.
 * A number of Sensor Modules and Cameras.
 * Various different types of ammo.

Trivia

 * Near one of the blocked train routes, there is a gnome holding a camera facing two teddy bears. The teddy bears are tied to the train tracks holding a "HELP US" sign.
 * As you get near the location of Margot, you will encounter a skeleton hanging from the ceiling. He seems to be the remains of a maintenance man who was killed after touching the electrified third rail.

Appearances
The appears in the Fallout 3 DLC Broken Steel.