Former South African president Nelson Mandela has died. Click here to read this story as updates become available.
For further coverage of Mandela's death, read NPR's Mandela series.
Below, watch a 1990 ABC Nightline town hall with the human-rights champion. At the 24-minute mark, he comments on Fidel Castro. At he 30-minute mark, he comments on Palestinian leader Yasser Arafat.