President Barack Obama speaks at Nelson Mandela's memorial service in Johannesburg. Standing to his right, Thamsanqa Jantjie gestures as if he is interpreting the speech for the deaf community. Alexander Joe/AFP/Getty Images hide caption

itoggle caption Alexander Joe/AFP/Getty Images

Thamsanqa Jantjie, whose appearance at a memorial service for Nelson Mandela angered many in South Africa's deaf community and has led to an apology from the government. His sign language interpretation was just meaningless gestures, say those who understand that language. Tsvangirayi Mukwazhi/AP hide caption

itoggle caption Tsvangirayi Mukwazhi/AP