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, 34, appeared alongside President Obama and other world leaders during Tuesday's memorial for Nelson Mandela in Johannesburg, South Africa. Many in the deaf community are outraged over Jantjie's sign language interpretation. Pedro Ugarte /AFP/Getty Images hide caption

itoggle caption Pedro Ugarte /AFP/Getty Images