from megaton, go straight east until u reach the river. follow it until u find a bridge. cross it, and go left or right and ur in downtown. to get to the monuments and stuff you'll need to find a metro tunnel.
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
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.
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.
3 million
It depends on which time you are there. The first time (which is my guess) you need to make your way to the Rotunda and you will eventually find a set of notes from James, where you need to read through them to discover where he went.
The Jefferson Memorial was built to honor Thomas Jefferson.
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.
The Jefferson Memorial Started: November 15th 1939 Finished: April 13 1943 :) <3 Hope this helps!