| atomic bomb | 20 |
| nuclear bomb | 6 |
| hydrogen bomb | 3 |
| cluster bomb | 1 |
| pipe bomb | 1 |
| transit | 0.30 |
| flight | 0.29 |
| first 24 hours | 0.27 |
| our disposal | 0.25 |
| the building | 0.25 |
| car | 0.20 |
| the air | 0.20 |
| germany | 0.16 |
| hit the ground | 0.63 |
| drop on hiroshima | 0.57 |
| drop on nagasaki | 0.56 |
| start fire | 0.55 |
| send shrapnel | 0.49 |
| kill three people | 0.49 |
| hit the target | 0.47 |
| kill people | 0.47 |
| drop on japan | 0.46 |
| end the war | 0.45 |
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| injury | 0.43 |
| death | 0.36 |
| damage | 0.34 |
| panic | 0.25 |
| third-degree burns | 0.23 |
| casualty | 0.22 |
| disproportionate collap… | 0.20 |
| unprecedented destructi… | 0.20 |
| the crash | 0.20 |
| gigantic explosion | 0.20 |
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| previous government | 0.32 |
| assembling two gas cani… | 0.27 |
| someone | 0.25 |
| putting dry ice | 0.18 |
| pressure cookers | 0.33 |
| potassium chlorate | 0.33 |
| gunpowder | 0.32 |
| tatp | 0.32 |
| aluminium powder | 0.30 |
| sulfur | 0.30 |
| dynamite | 0.29 |
| cardboard tubes | 0.27 |
| fertilizer | 0.18 |