1. In 1863, President Abraham Lincoln delivered his famous Gettysburg Address during the dedication ceremony of the Soldiers' National Cemetery in Gettysburg, Pennsylvania. The speech was just 272 words long, but it became one of the most memorable and important speeches in American history.

2. In 1915, Washington became the first state in the US to grant women the right to vote. The state's suffrage campaign had been going on for years, and the victory was a major milestone in the women's rights movement.

3. In 1959, Washington State University's football team, the Cougars, defeated the University of Washington's Huskies 20-0 in a game that became known as the "Apple Cup." The annual rivalry game has become one of the most important events in the state's sports calendar.

4. In 1981, the Seattle Times reported that a mysterious explosion had been heard in the skies over the Olympic Peninsula. The cause of the explosion was never determined, but it remains a topic of fascination for many Washingtonians to this day.

5. In 2016, a man named D.B. Cooper, who had hijacked a Northwest Orient Airlines plane in 1971 and then parachuted out of the plane with $200,000 in ransom money, was identified as a Washington state resident. The FBI was never able to definitively solve the case, but the mystery surrounding Cooper's identity and whereabouts continues to captivate the public.