The tunnels from Bunker 13 lead up to the Jefferson Memorial where a Drudge army is waiting for Ford after he hacks the Bunker's computer systems.
Adams then turns on Ford, leaving him stranded against the Drudge forces. But Ford is then unexpectedly contacted by Prometheus. During the battle, Prometheus explains that Adams was only using Ford to get to the ASE. After defeating the last of the Drudge forces at the Memorial, Prometheus sends a helicopter to pick up Ford. ("Enemy")