This smaller research station, known to the Department of Defense as PNUTS (Possible Nuclear Underground Test Site) and the CIA as URDF-3 (Unidentified Research and Development Facility-3) was of great interest to American observers.
Această stație de cercetare mai mică, cunoscută de către Departamentul de Apărare al SUA drept PNUTS (Possible Nuclear Underground Test Site) și CIA ca URDF–3 (Unidentified Research and Development Facility–3) a fost de mare interes pentru observatorii americani.