. . "biological weapons appear on the battlefield" . "use of biological weapons by the United States" . "US had waged germ warfare" . "biological warfare" . "alleged to have assisted the US in employment of BW in the Korean War" . "US biological warfare during the Korean War" . "Chinese and North Korean allegations that the U.N. forces engaged in biological warfare" . "Allegations of American biological warfare during the Korean War" . "accused the US" . "bacteriological warfare in Korea" . "germ warfare in Korea" . . . . "allegations of US biological warfare in the Korean War" . "Allegations of biological warfare in the Korean War" . . "alleged the US was deploying biological weapons" . "Allegations of biological warfare in the Korean War" . . "confession of germ warfare" . "allegations of biological warfare in the Korean War" . . "germ warfare" .