Who Dares Wins

 is a Fallout 3 quest and achievement that is added to the game in the Broken Steel downloadable content pack.

Enter the Presidential Metro
Entering the Presidential Sub Level from Utility, you will face several Mister Gutsys, and some Sentry Bots. After navigating through the sub level, the Lone Wander encounters M.A.R.Go.T (Metro Authority Rapid Governmental Transit System), a semi-sentient A.I. whom the Lone Wander may talk to. Upon talking, M.A.R.Go.T will try to identify the Lone Wanderer, which can be bypassed through a speech check, or a high enough science skill to bypass security protocol. If the Lone Wander passes security checks, he is marked as 'friendly', and so the robots of the Presidential Metro will no longer attack. M.A.R.Go.T explains that their has been a breach in security in the Presidential Metro, caused by unidentified persons who have no internal body heat an are emitting lethal levels of radiation.

Locate the Exit to Adams Air Force Base
Upon entering the Presidential Metro, the Lone Wanderer is faced by several Feral Ghoul Reavers, and Glowing Ones. It is very useful at this point to have been marked 'friendly' by M.A.R.Go.T, as the Sentry Bots and RoboBrains are helpful in dispatching the Feral Ghoul Reavers, who can be tough to kill. After killing all the Feral Ghouls, proceed down the corridor, through the equipment room (be sure to pick up the Nuka-Cola Quantum in here), and down the next tunnel. If you kill the Feral Ghouls as you go, you will soon clear the security breach. At the end of the tunnel, on the left is a Metro train. Climb into the front, and activate the Metro Console to reach the Adams Air Force Base end of the Presidential Metro. At the top of the stairs is a locked door (average) behind which is a terminal to shut down the turrets just round the corner. After removing the Enclave Soldiers by the turrets, proceed on to Adams Air Force Base.

Retrieve your orders and equipment from the Resupply Crate
At the top of the exit stairwell, look left. The resupply crate is just behind the small building, by the wall. Contained inside are your orders, and a Tesla Cannon. The orders explain that opening the resupply crate triggered a beacon, and that the Brotherhood are to commence an assault on receiving that beacon to cover your entry.