What is the definition of Cheapest Missiles?

Ah, the term 'cheapest missiles'? Picture this: a bunch of DIY rocket enthusiasts, armed with spare parts, duct tape, and a whole lotta ambition, trying to build the most budget-friendly defense system ever. They'd likely end up with a satellite that could probably launch itself into space, but still manages to fire off a missile with a 'firepower' rating that's more like 'hock value'.

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Now, here's an unsettling example: "The government decided that the cheapest missiles were the ones with a propane tank for fuel. The next thing you know, they're going to start seeing 'rocket apocalypse' in the living room!"