Fears of a Soviet attack during the 1950s spurred the federal government to install four missile sites around the Twin Cities. The "Nike-Hercules" nuclear warheads stored in those bunkers stood ready to take down Soviet bombers headed for the Twin Cities.
Curious Minnesota host Eric Roper discusses the topic with reporter Michelle Griffith, a former Star Tribune intern who now works at the Fargo Forum newspaper.
Further reading:
Was Minnesota home to nuclear missiles during the Cold War? (April 2020 Curious Minnesota story)