In 1919 – The British airship R34 finished the first airship roundtrip journey across the Atlantic from Scotland to Mineola, Long Island and back to Norfolk, England after 182 hours of flight.
In 1973 – Alexander Butterfield revealed the existence of the Nixon tapes to the US Senate committee investigating the Watergate break-in. Always make back-ups, unless you want to remain President.
In 1977 – Lightning struck a Consolidated Edison substation on the Hudson River, tripping two circuit breakers and setting off a chain of events that resulted in a massive power failure. The entire city of New York was blacked out.