 Complete the following phrase:  The 1955 24 Hours of Le Mans was the 23rd 24 Hours of Le Mans and took place on 11 and 12 June 1955 on Circuit de la Sarthe. It was also the fourth round of the F.I.A. World Sports Car Championship. During the race, Pierre Levegh crashed into a crowd of spectators, killing 84 and injuring 120 in 