A boy sleeps on his mother's lap at the First National Bank (FNB) Stadium, also known as Soccer City, ahead of former South African President's Nelson Mandela's national memorial service in Johannesburg December 10, 2013. World leaders from US President Barack Obama to Cuba's Raul Castro joined thousands of South Africans to honor Nelson Mandela on Tuesday in a memorial that will celebrate his gift for bringing enemies together across political and racial divides. [Photo/Agencies]