Ignacy Mościcki took Office. By recommendation of Pilsudski, Ignacy Moscicki was elected President of the Second Republic of Poland on June 1, 1926 but remained subservient to Pilsudski, and never openly showing dissent on any issue. After Pilsudski's death in 1935, Moscicki's influence on the state affairs increased substantially. This was due in large part to Pilsudski's revision of the Constitution which increased the powers of the Presidential office. Moscicki was the longest serving President in Polish history (from June 4, 1926 – September 30, 1939)
Nazi German officer Reinhard Heydrich died of his wounds: On May 27, 1942, Heydrich was ambushed in Prague by Czech soldiers Jozef Gabcik and Jan Kubis in Operation Anthropoid. When Heydrich's vehicle slowed down around a curved road, Gabcik stepped in front of Heydrich's vehicle, and attempted to open fire but his Sten gun jammed. Heydrich ordered his driver to stop the car and stood up to take aim against Gabcik. At that moment, Kubis threw a grenade at the vehicle, which ripped through the right rear fender, and embedded shrapnel into Heydrich's body. Kubis was also injured by the shrapnel. Heydrich got out of the car, and despite his injuries began to return fire while giving chase, but soon collapsed. His driver returned from his abortive attempt to chase Kubis, and Heydrich ordered him to chase Gabcik. The driver was shot twice and was wounded by Gabcik (who was now using his revolver) It seemed that the assassination attempt failed. Heydrich was rushed to hospital and was diagnosed with sepsis. He went into shock and died on June 4, 1942. Operation Anthropoid was the code name for the assassination of Heydrich and was planned by the British Special Operations Executive with the approval of the Czechoslovak government-in-exile. (Note: The Polish Underground has also assassinated several German officers, including high level Nazi German Officers - see Operation Kutschera (Feb 1, 1944) and Operation Burkl (Sept 7, 1943). The Polish Home Army assassinated many other German officers and commandants.)
The Polish legislative election of 1989 was the tenth election to the Sejm, the parliament of the Polish People's Republic, and the first election to the recreated Senate of Poland. The first round took place on June 4, right after the 1989 June 4th Beijing Tiananmen Square massacre in China, with a second round on June 18. It was the closest thing to a free election in the country since 1928, and the first since the communist Polish United Workers Party abandoned its monopoly of power in April. It resulted in a phenomenal victory of the Solidarity opposition and paved the way for the fall of communism in Poland.
Dr. Felix Zandman, Ph.D. died on this day in 2011. He was the founder and chief technology officer of Vishay Inter technology – one of the world's largest providers of electronic components. From 1946 to 1949 he studied physics and engineering in France at the University of Nancy. He was also enrolled at the Grande École of engineering E.N.S.E.M (Ecole Nationale Supérieure d'Electricité et de Mécanique). He received a Ph.D. at the Sorbonne as a physicist on a subject of photo elasticity.and was awarded the Edward Longstreth Medal from the Franklin Institute in 1962