1. 1848: Gold is discovered at Sutter’s Mill in California, sparking the California Gold Rush.

2. 1908: The Boy Scouts movement is founded in England by Robert Baden-Powell.

3. 1984: The Apple Macintosh, the first consumer computer to use a graphical user interface, is introduced.

4. 2003: The United States Department of Homeland Security officially begins operation.

5. 2020: The first confirmed case of COVID-19 in the United States is reported in Washington state.