The Vault
It is believed to be an underground, ultra- secret, ultra- secure storage facility of highly classified location, for dangerous items, or those items which would become dangerous to Earth by the revelation of their existence here. It is so secret that not even the Director knows its true location, and outside his immediate circle of critical department heads, it is at most a rumor. Said rumor purports that it is accessible by a classified maglev tube train, known only to the Director, Alpha One, and possibly one offworld advisor.