Head of State

 is a Fallout 3 quest. It is also an Xbox 360 and PC achievement.

Objectives and walkthrough
The quest is given to you in Temple of the Union by Hannibal Hamlin, who wants to relocate his slave haven to the Lincoln Memorial and restore it as a sign of freedom.

Hannibal directs you to travel to the Lincoln Memorial and see if it is still occupied by Super Mutants. He also asks you to talk with fellow slave Caleb Smith. Smith is a mason and will ask you to obtain a picture of Lincoln Memorial in the Museum of American History so he will have reference materials that will help him repair it.

Lincoln Memorial is free of mutants, but occupied with slave hunters from Paradise Falls led by Leroy Walker. In talking with Leroy, the player is given the option to reveal the slave hideout in Temple of the Union.

The quest can also be started by speaking to Leroy Walker in the Lincoln Memorial Maintenance area without speaking to Hannibal. The player will be asked to retrieve artifacts related to Lincoln in the History Museum. However, Leroy may go onto the restricted part of the memorial thereby preventing you from selling the artifacts to him because the slavers will turn hostile, including Leroy.

If the player reports back to Hannibal that there are no mutants, he will gather up his group and head for the memorial. He tells you to wait an hour and they will be ready. (If you fast travel to the memorial without waiting an hour, the group will not arrive until you fast travel back and trigger their departure.) If your strength is high enough you have an option to warn about the slavers, at which point Hannibal tells you to take care of them by any means.

Once the slaves arrive, they will ask for your help killing the slave hunters. If the player does not tell Hannibal to wait while you check it out (giving you time to go kill the slave hunters), then Hannibal will lead his group into battle. He is usually killed, which terminates the quest. However, if you "investigate" and kill the slave hunters, or have already done so, there will be no one to kill Hannibal when he leads the charge and the player can complete the quest.

Bug&Fix: If you kill slavers first and tell Hannibal about it, quest can be bugged. Save your game before talking to Hannibal, talk to him, and wait 1 hours, then go outside and stay there till they gather and start marching. Then, do not fast travel to Memorial itself, travel to nearest metro station, it's also shown as a quest marker on your map. When you travel there, he and his pack will be there and you get quest completed. And be sure that, metro station enterance is clear, otherwise, he'll attack whatever nearby and start marching to the completely wrong direction.

In short, do not fast travel to Memorial itself and be sure that it is clear around metro station.

This quest also add an extra video sequence during the end video.