The first US airmail stamps were issued, costing 24 cents.
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Three astronauts, Richard J. Hieb, Thomas D. Akers, and Pierre J. Thuot, simultaneously walked in space for the first time.
The first British-made jet bomber, the English Electric Canberra, made its first test flight.
The Beatles movie, 'Let it Be,' premiered.
The first railway line in Pakistan opened, with trains running from Karachi to Kotri.
OpenAI's newest version of ChatGPT, GPT-4 Omni (GPT-4o), went live.
