Mandela served 27 years in prison, initially on Robben Island, and later in Pollsmoor Prison and Victor Verster Prison. An international campaign lobbied for his release, which was granted in 1990 amid escalating civil strife. Mandela joined negotiations with President F. W. de Klerk to abolish apartheid and establish multiracial elections in 1994, in which he led the ANC to victory and became South Africa's first black president. He published his autobiography in 1995. He led South Africa's Government of National Unity and promulgated a new constitution. He also created the Truth and Reconciliation Commission to investigate past human rights abuses. While continuing with the former government's economic liberalism, his administration also introduced measures to encourage land reform, combat poverty, and expand healthcare services. Internationally, he acted as mediator between Libya and the United Kingdom in the Pan Am Flight 103 bombing trial, and oversaw military intervention in Lesotho. He declined to run for a second term, and was succeeded by his deputy, Thabo Mbeki. Mandela became an elder statesman, focusing on charitable work in combating poverty and HIV/AIDS through the Nelson Mandela Foundation.