Passage: Annan died on the morning of 18 August 2018 in Bern, Switzerland, at the age of 80 after a short illness. António Guterres, the current UN Secretary-General, said that "Kofi Annan was a champion for peace and a guiding force for good." The body of Kofi Annan was returned to his native Ghana from Geneva in a brief and solemn ceremony at the Kotoka International Airport in Accra, on 10 September 2018. His coffin, draped in the blue UN flag, was accompanied by his widow Nane Annan, his children and senior diplomats from the international organisation.On 13 September 2018, a state funeral was held for Annan in Ghana at the Accra International Conference Centre.  The ceremony was attended by several political leaders from across Africa as well as Ghanaian traditional rulers, European royalty and dignitaries from the international community, including the U.N. Secretary-General Antonio Guterres. Prior to the funeral service, his body lay in state in the foyer of the same venue, from 11–12 September 2018. A private burial followed the funeral service at the new Military Cemetery at Burma Camp, with full military honours – the sounding of the Last Post by army buglers and a 17-gun salute.

Question: In what country did Annan pass away?
Switzerland