Here are 5 interesting facts about September 11 in California history:

1. San Francisco International Airport was one of the affected locations on September 11, 2001. Flight 93, which was hijacked by terrorists, was scheduled to land at the airport before it tragically crashed in Pennsylvania.

2. After the attacks, Californians rallied to support the victims, with many volunteering their time and resources. Blood donations rose significantly, and Californians also donated money and supplies to various relief efforts.

3. Several Californians were among the victims of the terrorist attacks on September 11, including people who were on the planes that crashed in New York, Pennsylvania, and Washington, D.C.

4. In the aftermath of September 11, security measures were heightened around California's landmarks and landmarks across the United States. Heightened security measures were taken regarding the Golden Gate Bridge and other iconic landmarks.

5. The events of September 11, 2001 inspired changes in California's laws and policies, including more significant attention towards emergency preparedness, increased security measures, and changes to air travel security protocols.