Dag Hammarskjöld
![Hammarskjöld in the 1950s](https://upload.wikimedia.org/wikipedia/commons/c/c3/Dag_Hammarskj%C3%B6ld.jpg)
Hammarskjöld's tenure was characterized by efforts to strengthen the newly formed UN both internally and externally. He led initiatives to improve morale and organisational efficiency while seeking to make the UN more responsive to global issues. He presided over the creation of the first UN peacekeeping forces in Egypt and the Congo and personally intervened to defuse or resolve diplomatic crises. Hammarskjöld's second term was cut short when he died in a plane crash while en route to cease-fire negotiations during the Congo Crisis.
Hammarskjöld was and remains well regarded internationally as a capable diplomat and administrator, and his efforts to resolve various global crises led to him being the only posthumous recipient of the Nobel Peace Prize. His appointment has been hailed as one of the most notable successes for the organization. U.S. President John F. Kennedy called Hammarskjöld "the greatest statesman of our century". Provided by Wikipedia