Answer by taking a quote from the following article:

Frederik Willem de Klerk DMS (Afrikaans pronunciation: ['frI@d@r@k 'v@l@m d@ 'klerk]; born 18 March 1936) is a South African politician who served as State President of South Africa from 1989 to 1994 and as Deputy President from 1994 to 1996. South Africa's last head of state from the era of white-minority rule, his government focused on dismantling the apartheid system and introducing universal suffrage.

His presidency was dominated by the negotiation process, mainly between his NP government and the ANC, which led to the democratization of South Africa. In 1992, de Klerk held a whites-only referendum on ending apartheid, with the result being an overwhelming "yes" vote to continue negotiations to end apartheid. Nelson Mandela was distrustful of the role played by de Klerk in the negotiations, particularly as he believed that de Klerk was knowledgeable about 'third force' attempts to foment violence in the country and destabilize the negotiations.  In 1990, de Klerk gave orders to end South Africa's nuclear weapons programme; the process of nuclear disarmament was essentially completed in 1991. The existence of the programme was not officially acknowledged before 1993.  In 1993, De Klerk and Mandela were jointly awarded the Nobel Peace Prize for their work in ending apartheid. The awarding of the prize to de Klerk was controversial, especially in the light of de Klerk's reported admission that he ordered a massacre of supposed Azanian Peoples' Liberation Army fighters, including teenagers, shortly before going to Oslo in 1993. It appears that this massacre may form part of the basis for criminal charges that the Anti-Racism Action Forum laid against de Klerk in early 2016. Further, de Klerk's role in the destabilization of the country during the negotiation process through the operation of a 'third force' came to the attention of the Truth and Reconciliation Commission, and was never ultimately clarified.  After the first universal elections in 1994, de Klerk became deputy president in the government of national unity under Nelson Mandela, a post he kept until 1996. In 1997 he resigned the leadership of the National Party and retired from politics.  In 1993, de Klerk issued an apology for the actions of the apartheid government, stating that: "It was not our intention to deprive people of their rights and to cause misery, but eventually apartheid led to just that. Insofar as that occurred we deeply regret it... Yes we are sorry". Tutu urged for people to accept the apology, stating that "saying sorry is not an easy thing to do... We should be magnanimous and accept it as a magnanimous act", although was privately frustrated that de Klerk's apology had been qualified and had not gone so far as to call apartheid an intrinsically evil policy.

Are there any other interesting aspects about this article?
De Klerk and Mandela were jointly awarded the Nobel Peace Prize