To south africa now, where more than 50 world leaders will arrive to honor nelson mandela. President obama leaving on air force one tomorrow night with the first lady, of course, who met mandela with... See More
To south africa now, where more than 50 world leaders will arrive to honor nelson mandela. President obama leaving on air force one tomorrow night with the first lady, of course, who met mandela with her daughters. The obamas have invited former president george w. Bush and laura bush to travel them. The bushes have said they will. Former president clinton and hillary clinton making the trip, as will former president jimmy carter, too. Tonight, we learned queen elizabeth, who met mandela a number of times, has asked that her son prince charles attend in her place. And on this sunday in south africa, a day of prayer. And word from one of nelson mandela's daughters, during his final days. Abc's byron pitts is there. Reporter: This sunday was soaked in symbolism. The former township, once the epicenter of the anti-abo aboabo aboapartheid movement. He fought for our freedom. If it wasn't for him, we wouldn't be here. We wouldn't be having all the things that we have. Reporter: For nelson mandela's memorial service on tuesday, with world leaders from across the globe in attendance, it will be the largest security effort in south africa since the world cup in 2010. Tonight, new details about the life he lived are emerging from those who knew him best. His oldest daughter spoke of mandela's final moments. "I felt him slipping away from me," she said. "The team of highly trained meld call specialists looking after him had been amazed by him." And for one of the men sentenced to life in prison on robben island with mandela, his old friend told us madiba endured pretty cruelty behind bars. Even in prison, blacks were segregated and treated the worse. Indians and coloreds got lounge trousers. Madiba did not. He had short trousers. Indians and coloreds got bread. Madiba got bread for the first time after ten years. Reporter: And not once, his friend added, did nelson mandela ever complain. He persuaded the warden to change the rules. David, I want to show you something before we go. Within minutes of mr. Mandela's death, a few flowers were placed outside his home. Look at it now. In the days to come, there will be more.
This transcript has been automatically generated and may not be 100% accurate.