We followed the signs until we reached a building with metal roll-up doors clearly numbered in white paint.

C-11.

C-12.

C-13.

My pulse raced faster with every step we took down the dark lane.

Unit C-17 was near the far end of the building.

A solid brass padlock hung from the metal latch on the door.

I stepped forward, slid the small key into the lock, and turned it.