eading: The ratification of the United States Constitution marked a significant milestone in American history, as it established the framework for the federal government and the relationship between the government and the people. This event took place on June 21, 1788, when New Hampshire became the ninth state to approve the Constitution, thus meeting the requirement for ratification. --来自AI解读

eading: The Ferris wheel, invented by George Ferris, made its debut at the 1893 World's Columbian Exposition in Chicago. This massive structure, standing at 250 feet tall, was an engineering marvel of its time and provided panoramic views of the city to its passengers. It became an instant sensation and has since become a staple at amusement parks worldwide. --来自AI解读

eading: In the landmark case of Guinn v. United States, the Supreme Court ruled that Oklahoma's grandfather clauses, which restricted voting rights, were unconstitutional. This decision marked a significant step forward in the fight for civil rights and voting equality in the United States. --来自AI解读

eading: The Battle of Okinawa, fought during World War II, was one of the bloodiest battles in the Pacific theater. It ended on June 21, 1945, when organized Japanese resistance ceased in the Ryukyu Islands. This battle was crucial for the Allied forces as it provided them with a strategic location for launching further attacks on mainland Japan. --来自AI解读

eading: Pope Paul VI was elected as the successor to Pope John XXIII on June 21, 1963. During his papacy, he oversaw significant changes within the Catholic Church, including the completion of the Second Vatican Council, which aimed to modernize the Church and improve relations with other religions. --来自AI解读

eading: Prince William, Duke of Cambridge, was born on June 21, 1982, to Charles, Prince of Wales, and Princess Diana. He is currently second in line to the British throne and has become a prominent figure in British society, focusing on charitable work and supporting various causes. --来自AI解读

eading: On June 21, 2004, SpaceShipOne, the first privately funded spaceplane, made its maiden crewed flight in Mojave, California. This achievement marked a significant milestone in the development of private space exploration and paved the way for future innovations in space travel. --来自AI解读

eading: A powerful earthquake with a magnitude of 6.0 struck near the city of Guanajuato, Mexico, on June 21, 2012. The earthquake caused widespread damage and resulted in several casualties, highlighting the importance of disaster preparedness and emergency response measures. --来自AI解读

eading: On June 21, 2013, a military coup d'état took place in Egypt, resulting in the removal of President Mohamed Morsi from office. This event marked a significant turning point in Egyptian politics and led to a period of political unrest and instability in the country. --来自AI解读

eading: On June 21, 2019, a tragic shooting incident occurred in Darwin, Australia, resulting in the deaths of four men and injuring a woman. This event highlighted concerns about gun violence and the need for stricter gun control measures in Australia. --来自AI解读