The army is considering reactivating bunkers scattered around the country.
The head of the army, Thomas Süssli says that if the security situation gets worse, some of the 100+ decommissioned installations could be swiftly restored to firing condition.
Many remain in good shape, though expertise in their use is fading. A retraining programme is under discussion.
One restored site, which is now a museum, could reportedly be operational within two weeks.
Though an attack on Swiss borders remains unlikely, military analysts argue the return of these bunkers offers deterrence at low cost, marking a strategic shift from past assumptions of peace.
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