| Weapon in 1940s headlines | 25 |
| Oppenheimer development | 23 |
| Cloud producer, informally | 26 |
| WMD in 1940s headlines | 22 |
| Weapon of mass destruction | 26 |
| Mushroom cloud maker, briefly | 29 |
| Manhattan Project weapon | 24 |
| Manhattan Project outcome | 25 |
| Los Alamos project, briefly | 27 |
| Fat Man in New Mexico, e.g. | 27 |
| Fat Man in New Mexico e.g. | 27 |
| Enola Gay's cargo item | 26 |
| Big news in 1945, informally | 28 |
| Big blast maker, for short | 26 |
| Big bang maker, briefly | 23 |
| 1945 news, in headlines | 23 |
| "Fat Man," e.g. | 25 |
| "Give the dog ___" | 28 |
| What Mother Hubbard lacked | 26 |
| Second of a poetic trio | 23 |
| Between a rag and a hank | 24 |
| "A rag and ___" | 25 |
| Ending with peek or bug | 23 |
| ''Peek-___!'' | 29 |
| Peek-__ (tot's game) | 24 |
| "Peek" follower | 25 |
| Suffix with peek or bug | 23 |
| Peek-__ (kids' game) | 24 |
| Peek-__ (kid's game) | 24 |
| Peek-__ (baby's game) | 25 |
| Ending with bug or peek | 23 |
| Ending for peek or bug | 22 |
| Ending for "peek" | 27 |
| "Peek" add-on | 23 |
| "Peek-_____" | 22 |
| "Peek- ___!" | 22 |
| Desi Arnaz autobiography | 24 |
| "I could write __!" | 29 |
| "I could write ___" | 29 |
| Away from one's mouth | 25 |
| Multiple-choice choice | 22 |
| Multiple choice options | 23 |
| Test options, at times | 22 |
| Scantron choice, maybe | 22 |
| Possible Scantron options | 25 |
| Multiple choice answer | 22 |
| Earliest known inhabitant | 25 |
| Nunavut resident, typically | 27 |
| Scrub, as a space mission | 25 |
| Cancel, as a rocket launch | 26 |
| Mission-stopping command | 24 |
| Call off, at Cape Canaveral | 27 |
| Cancel, as a space flight | 25 |
| Scrub, at Cape Kennedy | 22 |
| Call off, as in an emergency | 28 |
| Withdraw, as from a mission | 27 |
| Verb in the space program | 25 |
| Terminate, at Cape Canaveral | 28 |
| Terminate before completion | 27 |
| Terminate at Cape Canaveral | 28 |
| Stop a military mission | 23 |
| Scrub, Cape Kennedy-style | 25 |
| Scrub, at Cape Canaveral | 24 |
| Scrub, as a space project | 25 |
| Scrub, as a space launch | 24 |
| Scrap the space mission | 23 |
| Scrap a launch attempt | 22 |
| Pull the plug on, at NASA | 25 |
| Press the egads button | 22 |
| NASA "Stop!" | 22 |
| Keep from ending normally | 25 |
| Halt a flight prematurely | 25 |
| End abruptly, NASA-style | 24 |
| Cut short, at Canaveral | 23 |
| Cut short, as a takeoff | 23 |
| Cut short, as a flight | 22 |
| Cut short a space trip | 22 |
| Cancel, as a space shot | 23 |
| Cancel on short notice | 22 |
| Cancel a missile launch | 23 |
| Cancel a bombing mission | 24 |
| Call off, at Canaveral | 22 |
| Like a failed space launch | 26 |
| Unsuccessful, as a mission | 26 |
| Cut short, as an attempt | 24 |
| Cuts short, as a space flight | 29 |
| Calls off, as a mission | 23 |
| Stops, as a missile flight | 26 |
| Scrubs a space mission | 22 |
| Cancels, as a moonshot | 22 |
| Terminates prematurely | 22 |
| Ends early, as a mission | 24 |
| Ends early, as a launch | 23 |
| Doesn't see through | 23 |
| Cuts short, as a space trip | 27 |
| Cancels, as a NASA mission | 26 |
| Cancels a space mission | 23 |
| "___ Ben Adhem" | 25 |
| "__ Ben Adhem" | 24 |
| Part of many Arab names | 23 |