<prompt> Pedzisa mutsara unotevera:  <response>: 35th G8 summit muna July 2009, vatungamiriri venyika vakazivisa kutsigira kwavo kuzvipira kwaObama-Medvedev kubvisa zvombo zvose zvenyukireya uye vakakurudzira nyika dzose kuita mamwe matanho mukubvisa zvombo zvenyukireya. Vatungamiri veGlobal Zero vanotenda kuti chibvumirano chenyika dzakawanda chokubviswa kwezvombo zvenyukireya chava kusvika pamwero mukuru, kunyanya zvichipiwa zvakaziviswa nevatungamiri vezvematongerwe enyika panguva yemusangano unokosha weUN Security Council pamusoro pekupararira uye kubvisa zvombo wakashevedzwa naPurezidhendi Obama September 24, 2009. Purezidhendi Obama akagamuchira Mubayiro weNobel Worugare wa2009 mukubvuma nhamburiko dzake dzokuderedza zvombo zvenyukireya. 