I navigated the nation through a period of significant social change and faced a major international crisis, while also being a champion of space exploration. My administration saw the passage of landmark legislation that reshaped American society. Who am I?

1. I served as Vice President before ascending to the presidency.
2. My time in office was marked by both triumphs in space and turmoil at home.
3. I signed into law the Civil Rights Act of 1964.
4. I was deeply involved in the early stages of the Vietnam War.