Historical clue formulations

• Tragic NASA mission of 1967 — 2024-04-24
• Mission honored by the "Fallen Astronaut" lunar memorial — 2024-04-14
• Ill-fated NASA mission of 1967 — 2018-08-19
• Ill-fated mission of 1967 — 2013-09-19
• Tragic mission — 2012-11-17