At Nelson Mandela's memorial service today in Johannesburg, South Africa, President Obama shook hands with Raúl Castro:

"Castro, he's shaking hands with Raúl Castro," said an excited Christiane Amanpour.

"As Christiane points out, President Obama just shook hands with Raúl Castro from Cuba," Chris Cuomo explained.

Amanpour says of Mandela, "This is a man, it is so true, who brought people together in life and he continues to bring people together today."

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