File:US Navy 030310-N-8273J-002 Manning the port lookout station, Seaman Sue Young wears a MCU-2-P gas mask during a simulated chemical, biological and radiological (CBR) warfare attack.jpg - Wikimedia Commons
A member of the 51st Security Forces talks through his MCU-2P chemical/biological protective mask.
A command post staffer wears an MCU-2P gas mask and protective gloves as he communicates information during the ground base defense Exercise Foal Eagle '91. - NARA & DVIDS Public Domain Archive