Go to the Minefield then head north if you keep going you'll eventually pick up a radio signal from the alien space craft when you find it there is a space craft and special gun with limited ammo. The house with the Luck bobblehead also contains a hidden shrine to Abraham Lincoln. It can be repaired with regular plasma rifles, but degrades slowly. It can be obtained from Harkness after siding with him in the 'Replicated Man' quest.
Easy Hacking, Speech, and Stealing bonuses.Abraham Lincoln shrine in Arlington Cemetery North.