JOHANNESBURG - The Trek4Mandela team had a surprise guest on Wednesday.
The climbers got to meet former first lady Graça Machel on their flight to Tanzania.
She's offered her support, saying the group was climbing for a great cause.
Machel also had a brief chat with Letshego Zulu, whose husband Gugu died on last year's expedition.
The team will start climbing on Friday.
They're hoping to summit Kilimanjaro on Madiba's birthday.