An hour later, the group was creeping through piles of bricks and glass toward The Wall. Several of the street lamps in this area were broken, and the dim shadows generated by the ghostly luminescence of the dome itself cloaked the street. They saw that a tunnel passed through the granite barricade at this point, the truck-sized opening sealed shut with rusty doors of riveted iron. There was a sign bolted to door, its lettering long gone to ferric oxidation.