Also, as people have been pointing out, &quot;Keep calm and carry on&quot; (on the other side of the Atlantic).<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Keep_Calm_and_Carry_On" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Keep_Calm_and_Carry_On</a><p>(On the other hand, there were a lot of wartime counterintelligence efforts in the U.S. and U.K. which I think must have included public calls for people to turn in suspected Axis spies.)