Passage: He retained some involvement in international affairs. In 2005, he founded the Nelson Mandela Legacy Trust, travelling to the US to speak before the Brookings Institution and the NAACP on the need for economic assistance to Africa. He spoke with US Senator Hillary Clinton and President George W. Bush and first met the then-Senator Barack Obama. Mandela also encouraged Zimbabwean President Robert Mugabe to resign over growing human rights abuses in the country. When this proved ineffective, he spoke out publicly against Mugabe in 2007, asking him to step down "with residual respect and a modicum of dignity." That year, Mandela, Machel, and Desmond Tutu convened a group of world leaders in Johannesburg to contribute their wisdom and independent leadership to some of the world's toughest problems. Mandela announced the formation of this new group, The Elders, in a speech delivered on his 89th birthday.Mandela's 90th birthday was marked across the country on 18 July 2008, with the main celebrations held at Qunu, and a concert in his honour in Hyde Park, London. In a speech marking the event, Mandela called for the rich to help the poor across the world. Throughout Mbeki's presidency, Mandela continued to support the ANC, usually overshadowing Mbeki at any public events that the two attended. Mandela was more at ease with Mbeki's successor, Zuma, although the Nelson Mandela Foundation was upset when his grandson, Mandla Mandela, flew him out to the Eastern Cape to attend a pro-Zuma rally in the midst of a storm in 2009.In 2004, Mandela successfully campaigned for South Africa to host the 2010 FIFA World Cup, declaring that there would be "few better gifts for us" in the year marking a decade since the fall of apartheid. Despite maintaining a low profile during the event due to ill-health, Mandela made his final public appearance during the World Cup closing ceremony, where he received much applause. Between 2005 and 2013, Mandela, and later his family, were embroiled in a series of legal disputes regarding money...

Question: Where did Mandela make his last public appearance?
World Cup closing ceremony