1. The Space Shuttle Columbia disaster occurred on February 3, 2003, which had a profound impact on Connecticut's aerospace industry. The shuttle's main engine was built by Pratt & Whitney, which is based in East Hartford, Connecticut. The tragedy led to increased safety measures and changes in the shuttle program.

2. On February 3, 1690, the town of Farmington was attacked by French and Indian forces during King William's War. The town was burned and several residents were killed or taken captive. The attack led to increased militarization of the region and tensions between the Native American population and European settlers.

3. On February 3, 1929, the Hartford Civic Center opened its doors for the first time. The arena hosted sporting events, concerts, and conventions. It was replaced by the XL Center in 2007.

4. Connecticut ratified the 19th Amendment to the United States Constitution on February 3, 1920. The amendment granted women the right to vote, and Connecticut was the 37th state to ratify it.

5. On February 3, 1839, the first meeting of the Connecticut Anti-Slavery Society was held in Hartford. The organization worked to abolish slavery and advocate for civil rights for African Americans. Notable members included abolitionists William Lloyd Garrison and Frederick Douglass.