Solve these clues to fill the grid.
- A nuclear weapon in which enormous energy is released by nuclear fission
- 4 Across
- Italian fascist dictator
- 5 Across
- North American republic containing 50 ___ - 48 conterminous ___ in North America plus Alaska
- 7 Across
- Russian leader who succeeded Lenin as head of the Communist Party and created a totalitarian state
- 10 Across
- An act of mass destruction and loss of life
- 11 Across
- European country whose capital is Berlin
- 12 Across
- A port city on the southwestern coast of Honshu in Japan
- 13 Across
- A speaker who ___ to a secretary or a recording machine
- 15 Across
- A former province of northwestern France on the English channel
- 1 Down
- A former communist country in eastern Europe and northern Asia
- 2 Down
- United States general who supervised the invasion of Normandy and the defeat of Nazi Germany
- 3 Down
- A ___ on Oahu to the west of Honolulu
- 6 Down
- Elected vice president in Roosevelt's 4th term
- 8 Down
- German Nazi dictator during World War II
- 9 Down
- Boot-shaped country in Europe famous for pasta
- 14 Down