People around the world give 67 minutes of service for Madiba's 67 years.
A white woman who worked as a personal assistant to Nelson Mandela has stirred unease about race relations in South Africa after criticizing the current president for allegedly making anti-white remarks.
The pop star has been criticized for sharing altered photos of Nelson Mandela and Martin Luther King Jr.
The U.N. condemns apartheid in South Africa.
Philadelphia hosted the Million Woman March on Oct. 25, 1997.
October is National Breast Cancer Awareness Month.