12 March 1990
While on a mission to foreign countries to ask them to break political ties and tighten sanctions against South Africa in order to speed political change, African National Congress (ANC) Vice-President Nelson Mandela met his old friend, ANC President Oliver Tambo, for the first time in twenty-eight years. The meeting took place in Sweden, where Tambo was recuperating from a stroke that had partially paralysed him the previous year.
References

The New York Times,"Isolate Pretoria,Mendela Demands",From: The New York Times,[Online],Available at: www.nytimes.com,[Accessed on: 03 March 2014]|(2003). Milestones,The Star, 12 March 2003.