Tijaabadii ugu horeysay ee bamka atomiga ee Midowga Soofiyeeti bishii Agoosto 1949 waxay timid ka hor intii Mareykanku filayay, McMahon wuxuu isla markiiba ku booriyay in wax soo saarka Mareykanka ee hubka atomiga si weyn loo kordhiyo. Intaa waxaa dheer, dhowrkii bilood ee xigay waxaa jiray dood adag oo ka dhex socotay dawladda Mareykanka, milatariga, iyo bulshada sayniska ee ku saabsan in la bilaabo horumarinta bamka hydrogen-ka ee aadka u awood badan, ka dibna loo yaqaan "Super". McMahon waxa uu aad u taageersanaa in la sii wado mashruuca Super, waxa uuna ku dooday in badan oo waraaqo ah oo uu u qoray Madaxweyne Truman. Senatorku wuxuu diiday doodaha ku salaysan akhlaaqda ee ka dhanka ah bamka hydrogen-ka kaas oo ku salaysan inuu si dabiici ah uga waxyeelo badan yahay hubkii hore, isagoo weydiinaya "Halkee kala duwanaanshaha akhlaaqiyaadka saxda ah ee u dhexeeya"
, iyo qaraxii Hiroshima, iyo waliba weerar kasta oo mustaqbalka ah oo lagu adeegsado tiknoolajiyad kasta oo keenta in khasaare baaxad leh.