1. In 1942, President Franklin D. Roosevelt signed Executive Order 9066, which allowed for the internment of Japanese Americans. This event had a profound impact on Washington, as the state had a significant population of Japanese Americans who were forced to leave their homes and businesses.

2. On February 19, 1986, the Space Shuttle Challenger disaster occurred, killing all seven crew members on board. The crew included Washington native and astronaut Ronald McNair, who had previously flown on the Shuttle mission STS-41-B in 1984.

3. In 1806, Meriwether Lewis and William Clark arrived at Fort Clatsop on the Oregon coast, after completing their expedition to the Pacific Northwest. The expedition was an important milestone in the exploration and mapping of the western United States, including Washington.

4. On February 19, 1915, the University of Washington formally adopted its new school colors of purple and gold. The colors were chosen to represent the state's native flora (the purple lilac) and the mineral wealth of the state (the gold of the Klondike Gold Rush).

5. In 2002, the Winter Olympics were held in Salt Lake City, Utah, which had an impact on the Pacific Northwest. Several events, including snowboarding and freestyle skiing, were held at Washington's Snoqualmie Pass. The games were also broadcast on television throughout the state, generating excitement and interest in winter sports.