https://www.cbc.ca/news/canada/nova-scotia/debert-bunker-owner-reward-unlock-cold-war-safe-1.5751828 ''The owner of a former Cold War-era bunker is offering a $1,000 reward for anyone who can guess the combination to a mysterious locked safe.'' ''The site is one of several gigantic underground complexes built by the federal government across Canada in the 1950s and 1960s to shelter political and military leaders after a nuclear strike. They were dubbed Diefenbunkers after Canada's Cold War prime minister, John Diefenbaker.'' ''The military doesn't know the code, either.'' ''Chances of guessing the safe's combination are — literally — one in a million. The code is made up of three numbers, each zero to 99. That equates to one million possible sequences. So far, the team estimates they have tried around 400 combinations. Former employees and safe experts are among those who have tried to crack the code.'' As for what's inside, that's part of the mystery, too. "So it would basically be the size to keep very small documents, like secret codes for example," Baha'i said.''