John Adams

South African artist John Adams works on a giant acrylic-on-canvas painting of Nelson Mandela in the driveway of his house in a suburb of Johannesburg, South Africa, Monday, July 15, 2013. Adams said he felt driven to create the painting as thanks to Mandela for creating educational opportunities that enabled him to become an artist, and plans to auction the painting, the proceeds of which will fund children's charities. (AP Photo/Ben Curtis)

Ben Curtis/AP

South African artist John Adams works on a giant acrylic-on-canvas painting of Nelson Mandela in the driveway of his house in a suburb of Johannesburg, South Africa, on Monday. Adams said he felt driven to create the portrait as a way of thanking the ailing former president for creating educational opportunities that enabled him to become an artist. He plans to auction the painting and donate the proceeds to children’s charities.