[kinghorse]

ok thanks. just caught the expressions and was intrigued.

[mwilli20]

kinghorse: notice how each leader's attache intently studies the other leader.
mwilli20: I believe those are translators looking at the lips of the other leader to ensure they pick-up every word...

Still your point is valid, the translators might be doing a bit of medical/psychological evaluation on the side.
With secretive regimes it is very important to gage the medical/mental state of the supreme leader. It helps with timing political moves, and with the ongoing negotiations. So I would not be surprised if the translators have a bit of medical/psych training on the side from their secret service.