1859 – The clock tower at the Houses of Parliament, which houses Big Ben, starts keeping time.
1911 – The RMS Titanic is launched in Belfast, Northern Ireland.
1921 – A race riot in Tulsa, Oklahoma kills at least 39 people.
1927 – The last Ford Model T rolls off the assembly line after a production run of 15 million vehicles.
1977 – The Trans-Alaska Pipeline is completed.
2005 – Vanity Fair reveals that Mark Felt was “Deep Throat” in the Watergate scandal.