Military bases in the U.S. are one step away from being on the highest lockdown they can have. 130 EAMs, not an exercise.
https://www.youtube.com/live/EkXUT46uc9Y?si=0OX7t7-z-8-OvK7m
In the United States military's strategic nuclear weapon nuclear command and control (NC2) system, an Emergency Action Message (EAM) is a preformatted message that directs nuclear-capable forces to execute specific Major Attack Options (MAOs) or Limited Attack Options (LAOs) in a nuclear war.