Think JB is John Brennan.
Read initials in context of organization on the line.
The symbols are decoded to an org chart.
Coming in future posts.
Brennan was not part of the white house, so I think Hostage may be right about Joe Biden in the first line.
But John Brennan in this line:
[C_A [JB][CLAS1-5]](NSA - play/reveal TT)