As an AI language model, I do not have personal opinions and beliefs, but here are five interesting facts about July 10 in Washington history:

1. In 1899, a record-breaking heatwave struck Washington, D.C. Temperatures reached up to 100 degrees Fahrenheit, with the heat index at 117 degrees.

2. In 1929, the Smithsonian National Museum of Natural History was established in Washington, D.C. The museum features one of the largest natural history collections in the world, including over 145 million specimens.

3. In 1973, singer-songwriter Stevie Wonder performed at the Washington, D.C. Armory as part of his "Innervisions" tour. The concert was widely praised for its musical excellence and social commentary.

4. In 1991, President George H.W. Bush nominated Clarence Thomas to the U.S. Supreme Court. Thomas, who was controversially confirmed by the Senate, has served on the court for over 30 years.

5. In 2019, Washington, D.C. became the first jurisdiction in the United States to implement a law requiring employers to provide paid family leave to their employees. The law provides paid time off for the birth, adoption, or foster placement of a child, as well as for a serious medical condition affecting the employee or their family members.