That &quot;code&quot; was widely known ... to the people controlling the missiles, the only people in the world who could actually use it.  Imho that means there was no code.<p>&quot;Our launch checklist in fact instructed us, the firing crew, to double-check the locking panel in our underground launch bunker to ensure that no digits other than zero had been inadvertently dialed into the panel.&quot;<p><a href="http:&#x2F;&#x2F;www.todayifoundout.com&#x2F;index.php&#x2F;2013&#x2F;11&#x2F;nearly-two-decades-nuclear-launch-code-minuteman-silos-united-states-00000000&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.todayifoundout.com&#x2F;index.php&#x2F;2013&#x2F;11&#x2F;nearly-two-d...</a><p>Or to really get the heartbeat up:<p>&quot;WASHINGTON — The Air Force said Wednesday it was only as &quot;an added precaution&quot; that an armored car was hurriedly parked atop a Minuteman 3 silo after the nuclear missile inside gave off false signals suggesting it was about to launch itself nearly four years ago.&quot; [They left the brakes off so that, should the cover slide open, the truck might fall into the silo and destroy the missile.]<p><a href="http:&#x2F;&#x2F;articles.latimes.com&#x2F;1987-10-29&#x2F;news&#x2F;mn-17348_1_minuteman-missile" rel="nofollow">http:&#x2F;&#x2F;articles.latimes.com&#x2F;1987-10-29&#x2F;news&#x2F;mn-17348_1_minut...</a>