On this day, Aug. 6 …

1945: During World War II, the U.S. B-29 Superfortress Enola Gay drops an atomic bomb code-named "Little Boy" on Hiroshima, Japan, resulting in an estimated 140,000 deaths.

Also on this day:

1806: The Holy Roman Empire goes out of existence as Emperor Francis II abdicates.

1890: Cy Young gains the first of his 511 major league victories as he pitches the Cleveland Spiders to a win over the Chicago Colts.

1911: Legendary actress-comedian Lucille Ball is born in Jamestown, N.Y.

1926: Gertrude Ederle becomes the first woman to swim the English Channel, arriving in Kingstown, England, from France in 14 1/2 hours.

Gertrude Ederle becomes the first woman to swim the English Channel, arriving in Kingstown, England, from France in 14 1/2 hours. 1945: During World War II, the U.S. B-29 Superfortress Enola Gay drops an atomic bomb code-named "Little Boy" on Hiroshima, Japan, resulting in an estimated 140,000 deaths.

1961: Soviet cosmonaut Gherman Titov becomes the second man to orbit Earth as he flew aboard Vostok 2; his call sign, "Eagle," prompted his famous declaration: "I am Eagle!"

Soviet cosmonaut Gherman Titov becomes the second man to orbit Earth as he flew aboard Vostok 2; his call sign, "Eagle," prompted his famous declaration: "I am Eagle!" 1965: President Lyndon B. Johnson signs the Voting Rights Act.

1991: The World Wide Web makes its public debut as a means of accessing webpages over the Internet.

2009: Sonia Sotomayor is confirmed as the first Hispanic Supreme Court justice by a Senate vote of 68-31.

2013: U.S. Army Maj. Nidal Malik Hasan goes on trial at Fort Hood, Texas, charged with killing 13 people and wounding 32 others in a 2009 attack.

2018: Twin Northern California wildfires grow to become the largest wildfire in state history, burning more than 440 square miles north of San Francisco.

Twin Northern California wildfires grow to become the largest wildfire in state history, burning more than 440 square miles north of San Francisco. 2018: A set of U.S. sanctions against Iran that were eased by the Obama administration under the terms of the 2015 nuclear deal go back into effect.

2019: Peter Strzok, the former FBI agent who wrote unflattering text messages about President Trump while investigating the Trump campaign’s alleged ties to Russia, files a lawsuit against the bureau and the Justice Department, arguing that the FBI caved to the “unrelenting pressure” from when it fired him.