I thought about captions, but decided it was better without them. The known and unknown faces cause the reader to place the faces with the names, and I think that implants the memory more deeply.
Agree with the tactic because it forced me to go surfing the names and find the face-match.
Zaid- https://heavy.com/news/2019/10/mark-zaid/
Atkinson - https://en.wikipedia.org/wiki/Michael_Atkinson_(Inspector_General)
Grace,Schiff & Misko —https://clintonfoundationtimeline.com/tags/abigail-grace/
Citronella- https://www.washingtonexaminer.com/news/white-house/alleged-whistleblower-eric-ciaramella-shown-shaking-hands-with-barack-obama-in-oval-office-photo