Keywords: USS George H.W. Bush operations 130131-N-YZ751-024.jpg en Boatswain's Mate 3rd Class Constance Grant left assists Operations Specialist 3rd Class Howard Tokheim in donning his MCU-2P gas mask during a chemical biological and radiological training exercise aboard the aircraft carrier USS George H W Bush CVN 77 George H W Bush is conducting training and carrier qualifications in the Atlantic Ocean U S Navy photo by Mass Communication Specialist 2nd Class Tony D Curtis 2013-01-31 Canadian Forces CPO 2 Anthony Curtis https //www dvidshub net/image/826022 130131-N-YZ751-024 2013-02-02 15 25 USS GEORGE H W BUSH CVN 77 AT SEA PD-USGov-Military-Navy USS George H W Bush CVN-77 MCU-2/P Protective Mask Images from DoD uploaded by Fæ Females wearing gas masks Males wearing gas masks |