President Barack Obama and nearly 100 other world leaders will join tens of thousands of mourners in South Africa Monday to pay their respects to Nelson Mandela.
The open-air stadium where Mandela's memorial service is to be held, can seat 94,000 people, and every seat is expected to be filled.
The event will rival in size the 1965 state funeral of former British Prime Minister Winston Churchill and the 2005 funeral of Pope John Paul II.
In addition to President Obama, Former Presidents George W. Bush, Bill Clinton and Jimmy Carter will be at the memorial.
But so will at least one U.S. foe, Cuba's President Raul Castro.
Castro will share the stage with President Obama when they speak at the memorial.
Will Mandela's message of forgiveness resonate?
And with so many high value targets on hand, and a time crunch of epic proportions, will the venue be safe?
OutFront: Former CIA operative Bob Baer and Joe Hagin, who was the deputy chief of staff for operations for President George W. Bush.