The emblem for the system \ "Futlon \" (sheep) - where to find this miracle? (Metal Gear Solid 5: The Phantom Pain)

In the description of the emblems, read, there must be a method of obtaining described.

look for a sheep on the platform for keeping animals, for the emblem with a gas mask on the quarantine platform.

Who knows why and where they get the background under the badge and description of the PMC? I also saw images of D-Dog, D-Horse, Miller and Snake himself as a background.

Spoiler

The Dark Side of
Ocelot too

The Dark Side
Also Emmerich and probably Code Talker.