In the long jump at the 1968 Olympic Games, which American athlete set a world record that would stand for 23 years?

Question

The longest winning streak by any nation at an event in the Olympic Games was set by the USA, between 1896 and 1968. What was the event?

Answer 1

Bob Beamon
He broke the existing record by a margin of 55 cm (21¾ in.) and his world record stood for almost 23 years until it was broken in 1991 by Mike Powell, while his Olympic record stands to this day.