Kammala wannan jumla: A watan Mayu na 1989, Rumack ya ziyarci Georgia a matsayin wani ɓangare na ƙungiyar masana uku da likitoci don 'Yancin Dan Adam suka ba da izini don bincika yiwuwar amfani da iskar gas a lokacin yakin basasa.
Ranar 9 ga watan Afrilu. Ya sami damar gano gas ɗin a matsayin chloropicrin wanda shine gas ɗin yaƙi ba bisa ƙa'ida ba ta amfani da masanin ƙididdigar taro a Jami'ar Kiwon Lafiya ta Jihar Tbilisi.