, ▁miss ile ▁technology ▁and ▁bi ological ▁war fare . ▁Among ▁the ▁special ists ▁in ▁the ▁latter ▁field ▁who ▁ended ▁up ▁working ▁in ▁the ▁U . S . ▁were ▁Walter ▁Sch rei ber , ▁Er ich ▁Tra ub ▁and ▁Kurt ▁Bl ome , ▁who ▁had ▁been ▁involved ▁with ▁medical ▁experiments ▁on ▁concentration ▁camp ▁in m ates ▁to ▁test ▁bi ological ▁war fare ▁agents . ▁Since ▁Britain , ▁France ▁and ▁the ▁Soviet ▁Union ▁were ▁also ▁engaged ▁in ▁rec ruit ing ▁these ▁scient ists , ▁the ▁J oint ▁Int elligence ▁Object ives ▁Agency ▁( J IO A ) ▁wished ▁to ▁den y ▁their ▁services ▁to ▁other ▁powers , ▁and ▁therefore ▁alter ed ▁or ▁conce aled ▁the ▁records ▁of ▁their ▁Naz i ▁past ▁and ▁invol vement ▁in ▁war ▁cr imes . ▁ ▁Test ing ▁performed ▁on ▁Se vent h - day ▁Advent ists , ▁ 1 9 4 0 – 1 9 7 4 ▁The ▁U . S . ▁General ▁Account ing ▁Office ▁issued ▁a ▁report ▁on ▁September ▁ 2 8 , ▁ 1 9 9 4 , ▁which ▁stated ▁that ▁between ▁ 1 9 4 0 ▁and ▁ 1 9 7 4 , ▁DO D ▁and ▁other ▁national ▁security ▁ag encies ▁studied ▁hundreds ▁of ▁thousands ▁of ▁human ▁subjects ▁in ▁tests ▁and ▁experiments ▁involving ▁ha z ard ous ▁subst ances . ▁ ▁The ▁quote ▁from ▁the ▁study : ▁ ▁Many ▁experiments ▁that ▁tested ▁various ▁bi ological ▁agents ▁on ▁human ▁subjects , ▁referred ▁to ▁as ▁Operation ▁White co at , ▁were ▁carried ▁out ▁at ▁Fort ▁Det rick