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The Sentinel ICBM project (already at 2x initial budget, and set to balloon further) will be the most expensive project since the interstate freeway system was built.

https://arstechnica.com/space/2026/02/the-air-forces-new-icb...

So, an all-city high-speed rail network would certainly be achievable for a small fraction of the total US military budget.

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well yeah. the pentagon wastes 1 trilly per year. a lot of stuff can be paid for with that kind of money.
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That is the thing that is the most disappointing—that we could have had it so much better.
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