The first four-engine aircraft was built and flown by Igor Sikorsky.
Source
OpenAI's newest version of ChatGPT, GPT-4 Omni (GPT-4o), went live.
Zakir Husain began an almost two-year term as President of India.
Apple released its Macintosh System 7.0.
Three astronauts, Richard J. Hieb, Thomas D. Akers, and Pierre J. Thuot, simultaneously walked in space for the first time.
The first US airmail stamps were issued, costing 24 cents.
