Kammala wannan magana: Da ƙarshen yaƙin ya kusanto, Truman ya tashi zuwa Berlin don taron Potsdam, don ganawa da shugaban Soviet Joseph Stalin da shugaban Burtaniya Winston Churchill game da tsarin bayan yaƙin. An yanke manyan shawarwari da yawa a Taron Potsdam: Za a raba Jamus zuwa yankuna huɗu (tsakanin iko uku da Faransa), za a tura iyakar Jamus zuwa yamma zuwa layin Oder <unk> Neisse, an amince da ƙungiyar da Soviet ke tallafawa a matsayin halattacciyar gwamnatin Poland, kuma Vietnam za a raba ta a layi na 16. Tarayyar Soviet ta kuma amince da
kaddamar da mamayewa na Jafananci-daure Manchuria. Duk da yake a taron Potsdam, an sanar da Truman cewa gwajin Trinity na bam din bam na farko a ranar 16 ga Yuli ya yi nasara. Ya nuna wa Stalin cewa Amurka na shirin amfani da wani sabon makami a kan Jafananci. Kodayake wannan shine karo na farko da aka ba da Soviet a hukumance game da bam din nukiliya, Stalin ya riga ya san shirin bam ɗin, da ya san game da shi ta hanyar leken asiri tun kafin Truman ya yi.