During the Cuban missile crisis a majority of B-47 bombers with capability to drop nuclear payloads were "dispersed" to Volk, among other bases, to make it harder for the Soviets to threaten USAF assets..
At around midnight on October 25, 1962, a guard at the Duluth Sector Direction Center saw a figure climbing the security fence. He shot at it, and activated the "sabotage alarm." This automatically set off sabotage alarms at all bases in the area. At Volk Field, Wisconsin, the alarm was incorrectly wired, and the Klaxon sounded which ordered nuclear armed F-106A interceptors to take off.
Immediate communication with Duluth showed there was an error. By this time aircraft were starting down the runway and Volk was too small for a control tower (its aircraft were dispatched from Duluth 300 miles (480 km) away). A truck raced from command center and successfully signaled the aircraft to stop.
The intruder was later identified as a black bear, not the Soviet saboteurs in advance of a nuclear attack the sentry was expecting.