This sports center in Finland is hiding a secret: It's a dual-use emergency shelter designed to keep 7,000 people safe in the event of a nuclear attack. WSJ takes a look inside. 🎥 https://t.co/ifQ3jAAnSk https://t.co/OfIjgwpW9M ...

As Russia’s war with Ukraine threatens to spill over into Europe, nations around the world are rapidly restoring and expanding their network of shelters to keep people safe in the event of a chemical, biological or even nuclear attack. Shelter construction companies have been heading to Finland and Switzerland to see what it takes to build a bunker that can withstand modern day threats. WSJ traveled to Finland to check out one of the country’s largest modern nuclear shelters that can keep 7,000 residents in ...