Secretary-General of the United Nations the appointee's national origin and to gender equality, although no woman has yet served as Secretary-General. The length of the term is discretionary, but all Secretaries-General since 1971 have been appointed to five-year terms. Every Secretary-General since 1961 has been re-selected for a second term, with the exception of Boutros Boutros-Ghali, who was vetoed by the United States in the 1996 selection. There is a term limit of two full terms, established when China cast a record 16 vetoes against Kurt Waldheim's third term in the 1981 selection. No Secretary-General since 1981 has attempted to secure a third term. The
1961 United Nations Secretary-General selection peacekeeping mission. On 18 September 1961, Hammarskjöld flew to Ndola in Northern Rhodesia to meet with rebel leader Moïse Tshombe of the State of Katanga. After circling the airfield twice, the airplane crashed, killing Hammarskjöld and all but one of the other occupants. The airplane crash set off a succession crisis at the United Nations, as Hammarskjöld's death required the Security Council to vote on a successor. The Soviet Union had been pushing to replace the Secretary-General with a troika, the three men to be named by each of the Three Worlds of the Cold War. The Soviets recommended that