We headed down the first hallway. One wall had been stacked haphazardly up to the ceiling with hospital beds. Other furniture littered the floor in pieces, along with loose papers and machinery, some of it so packed together in places that we had to slowly climb our way around it. The smell of animal carcasses and mildew thickened the air.

"Go left. Second door on your right," Bast said.

Near the end of this hallway, a bent wheel on a flipped over wheelchair spun ...