Staff from the Nelson Mandela Museum with children participating in a summer camp at the museum sing with a poster signed by the children at the home of former South African President Nelson Mandela in Qunu, June 26, 2013. Mandela's health deteriorated at the weekend, bringing the sombre realisation for South Africa's 53 million people that the man who epitomised defiance of white minority rule and forged the post-apartheid "Rainbow Nation" may not be with them for ever.[Photo/Agencies]