Clinton clasped hands with South Africa's first black president Friday in Johannesburg. When the shutters stopped clicking, she joked she didn't want to release his hands, and the 91-year-old Mandela responded with a smile and a thumbs up.

The two met privately for 30 minutes. Clinton, accompanied by Mandela's wife Graca Machel, also toured a collection of documents and photos from his life.

Clinton said the careful notes Mandela had made revealed the "discipline that he brought to a life filled with so many great achievements."

South Africa was the second stop on Clinton's seven-nation African tour.
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