▁as ▁far ▁as ▁the ▁official ▁files ▁allow , ▁the ▁best - document ed ▁case ▁for ▁the ▁pro sec ution ▁yet ▁made ". ▁In ▁the ▁same ▁year ▁End ic ott ' s ▁book ▁was ▁published , ▁Kath ry n ▁We athers by ▁and ▁Mil ton ▁Le iten berg ▁of ▁the ▁Cold ▁War ▁International ▁History ▁Project ▁at ▁the ▁Wood row ▁Wilson ▁Center ▁in ▁Washington ▁released ▁a ▁cache ▁of ▁Soviet ▁and ▁Chinese ▁documents ▁that ▁claimed ▁to ▁have ▁revealed ▁that ▁the ▁bi ow ar fare ▁alleg ation ▁was ▁an ▁elaborate ▁dis information ▁campaign ▁by ▁the ▁commun ists . ▁In ▁addition , ▁a ▁Japanese ▁journalist ▁claims ▁to ▁have ▁seen ▁similar ▁evidence ▁of ▁a ▁Soviet ▁dis information ▁campaign ▁and ▁that ▁the ▁evidence ▁supporting ▁its ▁occurrence ▁was ▁f aked . ▁In ▁ 2 0 0 1 , ▁anti - comm un ist ▁historian ▁Herbert ▁Rom er stein ▁supported ▁We athers by ▁and ▁Le iten berg , ▁critic izing ▁End ic ott ' s ▁research ▁for ▁using ▁evidence ▁provided ▁by ▁the ▁Chinese ▁government . ▁ ▁In ▁March ▁ 2 0 1 0 , ▁the ▁alleg ations ▁were ▁investig ated ▁by ▁the ▁Al ▁J aze era ▁English ▁news ▁program ▁People ▁& ▁Power . ▁In ▁this ▁program , ▁Professor ▁Mor i ▁Mas ata ka ▁investig ated ▁historical ▁artifact s ▁in ▁the ▁form ▁of ▁bomb ▁cas ings ▁from ▁US ▁bi ological ▁weapons , ▁contemporary ▁document ary ▁evidence ▁and ▁e y ew it ness ▁test imon ies . ▁He ▁concluded ▁that ▁the ▁United ▁States ▁did , ▁in ▁fact , ▁test ▁bi ological ▁weapons ▁on ▁North