The sisters Ayanda, background, and Ntombi Ntshingita sign a condolence book for former president Nelson Mandela outside his first township home in Alexandra in Johannesburg, Saturday, Dec. 7, 2013. Mandela moves to the house at Alexandra in 1941. South Africa is readying itself for the arrival of a flood of world leaders for the memorial service and funeral of Nelson Mandela as thousands of mourners continued to flock to sites around the country Saturday to pay homage to the freedom struggle icon. (AP Photo/Markus Schreiber)