Which of these military products is considered one of the greatest procurement failures of the 20th century, costing billions before being canceled without ever seeing combat?

Throughout history, military forces have invested billions in weapon systems and equipment that sometimes failed spectacularly. These product failures not only wasted resources but occasionally changed the course of conflicts. This trivia tests your knowledge about notorious military procurement failures and the lessons learned from these expensive mistakes. Can you identify one of the most infamous examples from the Cold War era?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

The M247 Sergeant York DIVAD (Divisional Air Defense) system, which couldn't reliably distinguish between helicopters and trees
The XM29 OICW rifle system, which was canceled due to its excessive weight and prohibitive per-unit cost
The RAH-66 Comanche stealth helicopter, which was developed for 22 years before cancellation in 2004
The Expeditionary Fighting Vehicle (EFV), which faced persistent reliability issues despite $3 billion in development costs