**CLASSIFIED DOCUMENT: EYES ONLY** Anomaly Codename: "mp3nt3" Date: March 30, 1955 Location: Cygnus X-1 Research Facility A localized distortion in spacetime has created a recursive fold in the architecture of Sector 4. The "Echo Chamber" has manifested as a labyrinthine structure with infinitely regressing doorways. Observers report experiencing "temporal stick-slip" phenomena, where consciousness is vacillated between parallel iterations. All attempts to map the anomaly have resulted in cartographic feedback loops. The facility's director has been replaced by a homologous duplicate, sparking concerns of an ontological cascade. **CONTAINMENT PROTOCOLS ENGAGED**