Bin Talal connection with Christopher Steele?
key = information
stone = military
Who knows where the bodies are buried?
A keystone is where both sides of an arch join to form a whole.
Flynn being a spook (information) and military represents both in one.
We are the key (distributed information gathering)
The military is the stone.
Flynn is the keystone.
Think about the pol airstrike on Syrian rebels.
We gathered information.
Military used that information.
All we need is a keystone who knows how to operate in both worlds. To create a stable foundation upon which the world will be built.