Event:
Greatest number of participants, 31,678, on a bicycle tour, London
More Notable Events on June 10:
1964 Southern Democrats filibuster on civil rights bill ends; cloture invoked
1963 John F. Kennedy signs law for equal pay for equal work for men and women
1915 Girl Scouts founded
1834 HMS Beagle with Charles Darwin sails Pacific Ocean
1793 1st public zoo opens in Paris
