There is a place that is talked about by mutants and their families. It is a place full of horrors and nightmares. It is referred to by a code name that was gleaned from a encrypted transmission before they started to randomize their encryption sequences and rotate them on an hourly basis.
The Silent Citadel is the home of the creation of one Darius England and Katherine Lackland. They called her Rhona but to the world at large she is R1K and created for one purpose, that is to destroy Mutant Kind and any allies they have found.
The Silent Citadel is not a place that has been found as many believe it to fantasy of those lucky enough to escape but with no memory of how to get to it.
The citadel itself is actually a fortress and prison where R1K houses mutants and her operational staff who plans her missions. Here you will find all the subjects of the Silent Defense program who were created in the same vein as R1K. They lead strikes to root out the remaining American Mutant Population from this fortress and their staff are sycophants who believe in their cause and are devoted.
It is a multilevel fortress and prison with enough cells to contain at least ten thousand mutants, a proving grounds for testing new armor and sentinel designs, a facility for cloning replacement parts for the other members of her created family.
It is heavily defended and many things can be launched from here but the question on everyone's mind is...where is it?