<prompt> Translate the following text to SwahiliToday, a letter writer who once interviewed the spy claims that to the dead mans knowledge, U.S. authorities never approved Diems assassination.  <response>: Mwandishi mmoja wa barua aliyemhoji mara moja mpelelezi huyo anasema kwamba kwa ufahamu wa mtu aliyekufa, mamlaka za Marekani hazikuidhinisha mauaji ya Diem. 