Crack the Code!

This message is a from a CIA group resident in the Russian embassy, sent back to headquarters. Therefore, it is likely that it begins with "to headquarters:"

WARNING: This cryptogram contains at least one "fixed point". These are letters of plaintext that encrypt to themselves as ciphertext. (For example, J encrypts as J, or something like that.)

Strength of Hint: 631 out of 1000

Good luck!

A :
B :
C :
D :
E :
F :
G :
H :
I :
J :
K :
L :
M :
N :
O :
P :
Q :
R :
S :
T :
U :
V :
W :
X :
Y :
Z :

Frequency Distribution of Ciphertext


Frequency Distribution of English

A joint project of Brendan Bard, Prof. Gregory Bard, and Prof. Seth Dutter, University of Wisconsin---Stout (January 30th, 2019)