>He guided the agency through a tumultuous time for nuclear development including the negotiation of the 2015 multi-lateral Iran nuclear deal.
I suspect he died not of natural causes, but natural causes.
Second 'their' should be 'there'
>He guided the agency through a tumultuous time for nuclear development including the negotiation of the 2015 multi-lateral Iran nuclear deal.
I suspect he died not of natural causes, but natural causes.
Second 'their' should be 'there'