# Mamaroneck Underground A semi-classified [[wiki/Bell Labs|Bell Labs]] research facility in the Westchester County town of Mamaroneck, New York, documented primarily through institutional folklore and partially corroborated declassified correspondence. The facility reportedly conducted defense-oriented research connected to Bell Labs' broader classified programs including [[wiki/SIGSALY|SIGSALY]], [[wiki/TEMPEST|TEMPEST]], and [[wiki/SAGE|SAGE]]-adjacent work. Independent verification remains thin, but the Mamaroneck story is plausible given Bell Labs' well-documented defense portfolio. Explored in [[articles/Bell Labs and the Distributed Architecture of American Power|Bell Labs and the Distributed Architecture of American Power]].