Share this postHappy National Superhero Day On Mediumdavidperlmutter.substack.comCopy linkFacebookEmailNoteOtherHappy National Superhero Day On MediumMy essay Happy National Superhero Day is now available to be read on Medium: https://dkperlmutter.medium.com/happy-national-superhero-day-120bd54132f4David PerlmutterApr 28, 20222Share this postHappy National Superhero Day On Mediumdavidperlmutter.substack.comCopy linkFacebookEmailNoteOtherShare