Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The men's 400 metres hurdles event at the 1952 Summer Olympic Games took place July 20 and July 21. The final was won by American Charles Moore. The 1952 Summer Olympics, officially known as the Games of the XV Olympiad, were an international multi-sport event held in Helsinki, Finland in 1952. Helsinki had been earlier given the 1940 Summer Olympics, which were cancelled due to World War II. It is famous for being the Olympic Games at which the most number of world records were broken, before the 2008 Summer Olympics in Beijing.