Silo Forty was implicated in a reported hack that severed control links; Donald associates its trouble with a powerful bomb.
Anna Thurman reports that Silo Forty lost communications about a year before her discussion of the crisis: camera feeds disappeared gradually before contact with its heads ceased. She suspects a rogue IT head began unauthorized contact with neighboring silos, and says Erskine authorized its shutdown under The Order.
The silo reportedly hacked the system, with its failsafes severed before its cameras went dark. Attempts to terminate it appeared to fail as other silos also lost contact. Anna later described the hack as cutting several facilities off from Silo One. Donald associates the earlier trouble at Forty with a bomb that shook dust from overhead pipes.
A silo implicated in lost communications, severed failsafes, and a reported challenge to central control.