It is near the Jefferson Memorial.
The Jefferson Memorial and in parts of the Capital Wasteland. http://fallout.wikia.com/wiki/Fallout_3_map
As Fallout 3 players will know, it was in the Jefferson Memorial, Washington D.C, made by the Lone Wanderer's father
Thier are simply to many to count but i will give you a couple any ways. One place is in Sergrave Holmes home in rivert city. Another is in the Jefferson memorial on top of the thing you would place the virus into. The last is in an area in Jefferson memorial that you find whil exploring.
well it cant be fxed but its problably that your disc is either dusty or scratched
Perhaps you download The Pitt when you were on the last quest and then you have not finished, I will not put any Spoilers, but you cannot continue after this
travel east from Anchorage memorial.
3 million
There are no Mounts in the unmodified version of Fallout 3.
Heh. You had that problem too, Huh?. Lyons is blocking the way. Just run up to her and keep running to push her out of the way. there shold be a control panel there.
There is no more a master key in Fallout 3.
The Jefferson Memorial Started: November 15th 1939 Finished: April 13 1943 :) <3 Hope this helps!