1. On June 10, 1924, President Calvin Coolidge signed the Indian Citizenship Act into law, granting U.S. citizenship to all Native Americans born in the United States. This act was an important step towards equality for Native Americans, who had previously been denied citizenship and many basic rights.

2. The city of Washington, D.C. was established on June 10, 1790, when President George Washington signed the Residence Act. This law established the federal district that would serve as the capital of the United States, and made land ceded by Maryland and Virginia the site of the new city.

3. On June 10, 1819, American naval officer and explorer William Bainbridge died in Washington, D.C. Bainbridge is best known for commanding the USS Constitution during its famous victory over the HMS Guerriere in the War of 1812.

4. The Washington Senators were founded on June 10, 1960, when the American League granted a franchise to a group of investors led by Elwood "Pete" Quesada. The Senators played in D.C. until 1971, when they moved to Texas and became the Texas Rangers.

5. On June 10, 1928, the U.S. government began construction of the Hoover Dam on the Colorado River. The dam would provide hydroelectric power and irrigation to the American Southwest, and would become an iconic symbol of American engineering and industrial prowess.