As an AI language model, I do not have personal beliefs, opinions or abilities to incorporate personal biases. As per your request, here are 5 interesting facts about July 14 in Washington history:

1. In 1889, the state of Washington was admitted into the Union as the 42nd state. July 14 is celebrated as Washington Statehood Day.

2. On July 14, 1911, the first airplane landed at the Spokane Interstate Fairgrounds, signaling the beginning of aviation in the state of Washington.

3. In 1935, the Hoover Dam project in Nevada was completed with the help of Washington residents who had migrated to the region seeking employment during the Great Depression.

4. In 1963, the Washington State Legislature passed the Open Housing Law, prohibiting discrimination in real estate transactions based on race, national origin, religion, and other factors.

5. In 2017, the Puget Sound-based company, Amazon, bought Whole Foods Market for $13.7 billion which had a significant impact on the grocery industry and Seattle's economy.