Historical clue formulations

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