Explorer Christopher Columbus sights the coast of present-day Venezuela. Thinking it an island, he christened it Isla Santa and claimed it for Spain. His men go ashore at what is now the Paria Peninsula a few days later.

As more than 5,000 athletes from 51 countries march into a stadium packed with 100,000 onlookers, Adolf Hitler makes his only public statement of the Berlin Olympics at its opening ceremony on this day in 1936: “I proclaim the Games of Berlin, celebrating the eleventh Olympiad of the modern era, to be open."

Anne Frank, the young Jewish girl hiding out in Nazi-occupied Holland whose [diary](http://U.S. forces attempt risky air raid on Axis oil refineries) came to serve as a symbol of the Holocaust, writes her final entry three days before she and her family are arrested and placed in concentration camps.

During World War II, an advance Soviet armored column under General Konstantin Rokossovski reaches the Vistula River along the eastern suburb of Warsaw, prompting Poles in the city to launch a major uprising against the Nazi occupation. The revolt was spearheaded by Polish General Tadeusz Bor-Komorowski, who was the commander of the Home Army, an underground resistance group made up of some 40,000 poorly supplied soldiers. In addition to accelerating the liberation of Warsaw, the Home Army, which had ties with the Polish government-in-exile in London and was anti-communist in its ideology, hoped to gain at least partial control of Warsaw before the Soviets arrived.

Charles Whitman takes a stockpile of guns and ammunition to the observatory platform atop a 300-foot tower at the University of Texas and proceeds to shoot 46 people, killing 14 people and wounding 32. Whitman, who had killed both his wife and mother the night before, was eventually shot to death after courageous Austin police officers, including Ramiro Martinez, charged up the stairs of the tower to subdue the attacker.

On August 1, 1981, MTV: Music Television goes on the air for the first time ever, with the words (spoken by one of MTV’s creators, John Lack): “Ladies and gentlemen, rock and roll.” The Buggles’ “Video Killed the Radio Star” was the first music video to air on the new cable television channel, which initially was available only to households in parts of New Jersey. MTV went on to revolutionize the music industry and become an influential source of pop culture and entertainment in the United States and other parts of the world, including Europe, Asia and Latin America.

On August 1, 1996, sprinter Michael Johnson breaks the world record in the 200 meters to win gold at the Summer Olympics in Atlanta. Three days earlier, Johnson had also won the 400 meters, making him the first man in history to win both events at the Olympics.