Nelson Mandela: Kings, queens, presidents and prime ministers fly in to pay tribute President Barack Obama, former President George W Bush and their wives were last night sharing a 16-hour flight on Air Force One. Flying separately will be two other former US presidents, Bill Clinton and Jimmy Carter. Twenty six members of the US Congress are making the journey. Mr Obama was expected to deliver remarks at the service, which will also be addressed by the presidents of Brazil, China and Cuba. Robert Mugabe, the Zimbabwean president, confirmed his attendance at the last-minute, along with Hamid Karzai, the Afghan president. Colins Chabane, the South African minister tasked with arranging the Mandela mourning events, extended a "warm South African welcome" to all the visitors. "Kings, queens, princes and princesses will be joined at FNB Stadium by representatives of international organisations such as the United Nations, African Union, European Union, the Commonwealth and the World Bank, and other VIPs," he said. The scale of the event, and the apparent last-minute nature of many of the arrangements, has led to speculation that there could be chaos. Mr Chabane rejected the suggestion, pointing to previous successfully-hosted events like the rugby and football world cups and the UN climate change summit. "For those who predict chaos, we are used to it," he said. It's not new and all the time, they have been proved wrong. He conceded that the task of arranging an event for 91 world leaders was daunting, but said the South Africans were proud to do it. "I said to the Secretary General of the United Nations, if you wanted to call a General Assembly, you could do it here rather than find another venue, they're all here," he said. Mr Mandela died on Thursday at age 95. After the stadium memorial, his body will lie in state at the Union Buildings, the seat of government in South Africa's capital, Pretoria, from Wednesday to Friday. He will be buried on Sunday in Qunu, the Nobel Peace Prize laureate's rural hometown in Eastern Cape Province. Nelson Mandela's oldest daughter meanwhile described the "wonderful" last days of her father's life, and how she believes he was able to hear his family around him until the end. Makaziwe Mandela, Mr Mandela's daughter with his first wife Evelyn, said she sat by his bed all day before he died, accompanied by his wife Graca and his grandchildren. "Until the last moment he had us, you know..." she told the BBC. I think from last week, Friday until Thursday, it was a wonderful time, if you can say the process of death is wonderful. But Tata [father] had a wonderful time, because we were there. When the doctors told us I think Thursday morning... that there was nothing that they could do, and said to me 'Maki call everybody that wants to see him and say bye bye', it was a most wonderful day for us because the grandchildren were there, we were there. As a prelude to the stadium event, Ban Ki-moon, United Nations Secretary General, and Archbishop Emeritus Desmond Tutu spoke at an event at the Nelson Mandela Centre of Memory. "What a fantastic gift God gave to us in this Mandela, who quickly became an icon, a global icon of forgiveness, of generosity of spirit," Archbishop Tutu said. He really was like a magician with a magic wand, turning us into this glorious, multi-colored, rainbow people.