| Answer | Crossword Clue |
|---|---|
| ALAMOGORDO | Site in New Mexico of first atomic explosion. |
| ALAMOGORDO | Site of first atomic explosion in New Mexico |
| LOSALAMOS | Site of atomic project in New Mexico. |
| OTERO | New Mexico county where the first atomic bomb was exploded |
| einsteinium | The chemical element of atomic number 99, a radioactive metal of the actinide series. Einsteinium does not occur naturally and was discovered in 1953 in debris from the first hydrogen bomb explosion |
