"History & Events ": HTML5 Crossword

Across

3. Which Japanese gang have the motto "help the weak and fight the strong"? (6)
5. What does the KKK stands for? (2,4,4)
6. Which city was attacked by a suicide bomber after an Ariana Grande concert? (10)
10. Who invented the first successful airplane? (6,8)
12. Where was the first Olympics held? (6)
14. Which Latina singer was murdered by her assistant? (6)
15. Where was the second atomic bomb dropped? (8)
16. Who was on trial during "The Trial of the Century"? (2,7)
17. ______ was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. (7)
18. How many planes were involved in the 9/11 attacks? (4)

Down

1. Which Roman emperor made his favorite horse a consul? (8)
2. Name the person who sang "Happy birthday" to U.S. president John F. Kennedy. (7,6)
4. What was Myanmar originally called? (5)
7. Which famous boxer had the tag line, "float like a butterfly sting like a bee? (8,3)
8. What was the American ban on alcohol called? (11)
9. Name the global celebration of the birth of Jesus Christ. (9)
11. What is the name of Rocky spin-off sequel? (5)
13. Who was the warrior king of the city-state called Sparta? (8)
17. What is the Black Death called today? (6)