The Peacemaker (1997)

Factual error: The Russians stopped using steam locomotives in the 1970's. So bringing one out of retirement in 1997 to haul nuclear warheads would mean that your highly secret nuclear train would be well known among rail enthusiasts for weeks before.

Hamilton: Russia, what a fucking mess! God, I miss the cold war.

Question: As Gavrich fled into a building being chased by Devoe and Kelly the helicopter operators informed that the (radiation) signal just disappeared. Would it really disappear so quickly?