<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.mkutano wa kilele kuhusu usalama wa nyuklia, unahudhuriwa na zaidi ya viongozi 50 wa mataifa na serikali pamoja na wawakilishi wa mashirika ya kimataifa.  <response>: the nuclear security summit nss process raised the profile of nuclear security and initiated a dialogue among more than 50 heads of state and international organizations. 