Led Zeppelin started their first tour at Ulster Hall, Belfast, UK.
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Beethoven's 4th Symphony in B was performed for the first time.
After a four-month journey, the Venera 14 spacecraft landed on Venus.
Willcom announced the world's smallest and lightest phone.
Colorado became the birthplace of the cheeseburger.
The battle of the Ruhr campaign began during WWII with an air raid in Essen, Germany.
