Explore the Bunker

Journal
''Yngvarr Diggins, the graveyard caretaker in Aerie, told me I could find what I'm looking for in Bunker T, a shelter of some sort located underneath the cemetery. He found a key from long ago that should unlock doors inside the bunker, and thinks I should use T-N-N on the door. He's letting me borrow the key while I search for the Reclamation Unit, but I'm supposed to return it afterwards.''
 * This quest will complete when you discover the location of the Reclamation (room).