On this day in History - August 10

1835 – P. T. Barnum begins his career as a showman and circus entrepreneur by exhibiting Joice Heth, an octogenerian African slave whom he claims was George Washington's nursemaid.

1913 – Second Balkan War: Delegates from Bulgaria, Romania, Serbia, Montenegro, and Greece sign the Treaty of Bucharest, ending the war.

1948 – Candid Camera makes its television debut after being on radio for a year as The Candid Microphone.

1954 – At Massena, New York, the groundbreaking ceremony for the Saint Lawrence Seaway is held.

1966 – The Heron Road Bridge collapses while being built, killing nine workers in the deadliest construction accident in both Ottawa and Ontario.