1903 – A group of Serbian officers attacks the royal palace, killing King Alexander Obrenovic and his wife, Queen Draga. This act resulted in the extinction of the Obrenovic dynasty, which ruled Serbia since the mid-19th century. After the May coup, the Serbian throne passed to Peter I of the Karadjordjevic rival dynasty.
1910 – Born in Saint Andre de Cubzac, Jacques Custeau. Custeau, was a French officer, naval officer, explorer, conservator, innovator, scientist, photographer, author, and researcher who studied the sea and all forms of life in water. He co-developed the technique of plumbing diving, guarding the marine pioneer, and was a member of the French academy.
1913 – Mahmoud Shevket Pasha dies at the age of 57. Shevket Pasha, was an Ottoman general and statesman, known for his active role in the creation of military aviation. He was Prime Minister of the Ottoman Empire from January 23, 1913, until his death, after an assassination attempt. He was killed in Istanbul, in a revenge attack by a relative of Nazim Pasha.
1935 – Inventor Edwin Armstrong gives the first public demonstration of FM broadcasting in the United States in Alpine, New Jersey. Frequency modulation (FM) is the encoding of information into a carrier wave by changing the immediate frequency of the wave. The term and technology are used in telecommunications and signal processing.
1962 – Frank Morris, John Anglin, and Clarence Anglin are suspected of being the only prisoners to escape from prison on the island of Alcatraz. The fate of the fugitives remains unknown after they entered the Gulf of San Francisco. A fourth prisoner, Allen West, failed to escape in time to join them and decided to abandon his endeavor.
1968 – Lloyd John Old identifies the first cell surface antigens that can be distinguished between different cell types. Lloyd Old was one of the founders and standard carriers of the field of cancer immunology. When he began his career in 1958, tumor immunology was in the early stages of its development.
2018 – US President Donald Trump and North Korean Kim Jong-un held their first meeting between the leaders of their two countries in Singapore. This would be the first meeting in history between the respective leaders of both countries, following a frozen political and diplomatic relationship since 1945.