Across
- 3. The name of the 1st satellite in space
- 4. The exact isotope of uranium that little boy used
- 6. The method that early nuclear wepons used to explode
- 8. The program name that sent astronauts to the moon
- 9. The tv program that shows old sitcoms
Down
- 1. The first time the world almost ended
- 2. the year that the space race officially began
- 4. One of the U.S. major enemies
- 5. One of the cities in Japan that suffered an atomic bombing
- 7. Modern politicians' source of wisdom