Mandela's Final Act Of Peace: Obama Shakes Hands With Fidel Castro's Brother (PHOTO)

President Obama shook hands with Cuban President Raul Castro today, an unprecedented gesture of friendship which occurred, fittingly, at the memorial service for Nelson Mandela. The handshake between leaders of the two Cold War enemies took place during a ceremony which honored the former South African President's powerful legacy of reconciliation. Obama greeted a long line of world leaders and heads of state attending the memorial service in Johannesburg after flying to South Africa with a U.S. delegation which included former presidents Bill Clinton, George W Bush and Jimmy Carter along with their families.