Once again, read the Yahoo caption. The man is Kerry's trip director.
Wolfstar, I think there is a difference of opinion on this one, and maybe it's just a question of reaction. I worked with someone who would hold up his finger like this everytime someone "beneath him" came into his office to indicate that he was not to be interrupted until he was ready. That may not be what is going on in the photo, but that was my read. I have no doubt that I can be wrong.
I just assumed from the title that Kerry thinks his Secret Service agents are really his Secret Servants.