| 2025-07-15 | Canceled, as a mission |
| 2024-12-30 | Forbidden |
| 2024-07-31 | Something that's not going to happen |
| 2024-02-26 | Canceled, as a mission |
| 2023-08-04 | Space scrap? |
| 2022-12-18 | Scrubbed, as a rocket launch |
| 2022-12-08 | Scuttled |
| 2022-11-28 | Called off, as a launch |
| 2022-08-05 | Canceled |
| 2022-07-27 | Called off |
| 2022-07-01 | Canceled |
| 2022-04-17 | Mission cancellation |
| 2022-01-07 | Canceled |
| 2020-08-25 | Like an area that's off-limits |
| 2020-04-14 | "Ain't happenin'" |
| 2019-08-17 | Something scratched |
| 2018-08-23 | Scrubbed |
| 2018-04-25 | Scrubbed |
| 2018-04-17 | Canceled, as a launch |
| 2017-09-20 | Scrapped, to NASA |
| 2017-08-22 | Aborted plan |
| 2017-01-03 | Canceled, as a mission |
| 2016-12-26 | Scrubbed, as a NASA mission |
| 2016-11-21 | Canceled, as a launch |
| 2016-02-10 | Scrubbed, as a mission |
| 2015-12-15 | "Ain't happening" |
| 2015-09-12 | Aborted |
| 2013-10-26 | Off-limits |
| 2011-11-24 | Canceled ... or a hint to answering 17-, 27-, 34-, 45- and 57-Across |
| 2011-08-09 | Canceled |
| 2011-03-30 | Scrubbed, as a mission |
| 2009-11-27 | Scrubbed |
| 2009-06-30 | Scrapped, as a mission |
| 2008-04-28 | Canceled |
| 2008-03-02 | NASA cancellation |
| 2007-05-10 | Scuttled mission |
| 2007-02-22 | Scrubbed |
| 2007-02-21 | Cancellation |
| 2007-02-04 | Scrubbed |
| 2006-12-13 | NASA scrub |
| 2006-10-26 | Canceled |
| 2006-06-19 | Aborted |
| 2006-04-02 | Scrubbed |
| 2005-11-06 | Forbidden |
| 2004-06-30 | Scrapped, at NASA |
| 2004-02-08 | Canceled |
| 2004-01-30 | Canceled |
| 2002-03-19 | NASA scrub |
| 2001-03-14 | Scrubbed mission |
| 2001-02-08 | Scrubbed |
| 2000-03-22 | Canceled, to NASA |
| 1999-07-28 | NASA cancellation |
| 1999-04-13 | Mission cancellation |
| 1999-03-07 | Unworkable |
| 1999-03-02 | Aborted mission words |
| 1999-02-01 | Failed attempt |
| 1998-02-27 | Inoperative |
| 1997-08-10 | Off |
| 1997-05-16 | Canceled |
| 1997-03-06 | Inoperative |
| 1997-02-17 | Canceled |
| 1996-09-15 | Canceled |
| 1995-12-13 | Canceled |
| 1995-03-13 | Canceled, as a launch |
| 1995-01-15 | Cancelled |
| 1994-06-11 | Canceled |
| 1993-12-10 | Canceled |