The F-35 Lightning II Joint Strike Fighter, the Pentagon’s most ambitious weapons program ever, has been plagued with mounting costs and delays that will result in a price tag of more than $2 trillion in the coming decades, according to a recent watchdog report by the Government Accountability Office.
It's just dollar signs, doesn't actually mean much in and of itself. But you can imagine what all the labor that went into designing and extracting resources and building the planes could have done, considering they've built quite a few of them.