Multiple choice general knowledge Which UN Secretary General was killed in a plane crash? U Thant Don Hammarskjold Kurt Waldheim Javier Peres de Cuellar Reveal answer Fill a bubble to check yourself B Correct answer Explanation Dag Hammarskjold (misspelled as Don in the option) died in a plane crash in 1961 while serving as UN Secretary-General, during a peace mission to Congo. U Thant, Waldheim, and Perez de Cuellar (also misspelled) served full terms.