Archbishop Desmond Tutu is giving a blessing to bring the memorial service to a close.
He begins: "I stand here as an old man and I want to remind you that we got to this point because we were disciplined. So I am not going to give you a blessing until all of you stand."
"I want to hear a pin drop," he exhorts, before looking all around him to check that everyone is standing.
"You must show the world that we are disciplined," he says.
Pictures released today give a unique look inside Air Force One as two former and one current US President flew to Nelson Mandela's memorial
Twenty years ago the soon to be President Mandela pledged to 'wash away the stains of apartheid' - two decades on those stains remain.
Barack Obama has led the tributes to Nelson Mandela saying that South Africa's democracy is his 'cherished legacy.'