| HIROSHIMA | First target of the atomic bomb (9) |
| MANHATTAN | Project that led to development of the atomic bomb |
| LOSALAMOS | New Mexico area recognised as a development and creation place of the atomic bomb (3,6) |
| KLAUS | Physicist convicted in 1950 of passing information to the Soviet Union about the development of the atomic bomb in the US (5,5) |
| FUCHS | Klaus ?, physicist convicted in 1950 of passing information to the Soviet Union about the development of the atomic bomb in the US |
| OPPY | Nickname for the boffin of the atomic bomb...like the headless flower of war and peace? (4) |
| OPPENHEIMER | J. Robert ---, US nuclear physicist known as the 'father of the atomic bomb' (11) |
| ROSEVILLE | Minnesota city where the first Target store opened [Spain] |
| NICHOLASI | Russian emperor who was the target of the Decembrist Revolt |
| MAILTRAIN | Holdup target of the old West |
| ENOLA | What was the name of the plane which dropped the atomic bomb on Hiroshima in 1945? (5,3) |
| ENOLAGAY | Name of the B-29 bomber that was used by the U.S. to drop the atomic bomb on Hiroshima (5,3) |
| HALFLIFE | In physics, the time required for 50 per cent of the atomic nuclei of a radioactive sample to decay (4-4) |
| HARWELL | Location of the Atomic Energy Research Establishment from the 1940s to the 1990s (7) |
| FALLOUT | Order given at the end of the Atomic tests? (4,3) |
| DENMARK | Anne of ____ , wife of James I of England and one of the targets of the Gunpowder Plot (7) |
| PROUT | William ___, English chemist noted for his modification of the atomic theory in the early 19th century |
| ABS | Target of the puzzle's title, and part of each of the long entries |
| ALDERMASTON | Location of the Atomic Weapons Establishment |
| GAY | The atomic bomb that destroyed Hiroshima was dropped from this aircraft, the Enola ... |
