Operations Security Bling By @Jessysaurusrex

tweeted by Jessy Irwin

Unfortunately I don't know the story behind Ms. Irwin's famous OpSec necklace (so famous people have been known to recognize her by it, ironically enough), but I imagine one could assemble something similar out of one of the many sets of alphabetic necklace charms available for purchase online.

And if you don't know what OpSec means, now's as good a time as any to learn.