The C-17 has had more money-driven last hurrahs than The Who. Even so, FY 2010 featured the USAF’s last planned orders of C-17 Globemaster III short field, heavy-lift transport jets.
The Pentagon had been trying to end the program for years, but 3 factors led Congress to keep adding new C-17s to the budget, year after year: (1) deep doubts about the premises, pre-9/11 vintage, and quality of the Pentagon’s mobility studies; (2) uncertainty concerning the C-5 Galaxy super-heavy transport’s upgrade programs; and (3) a fleet wear tempo much higher than originally forecast, driven by constant requests from theater for C-17s.
All things end, and there were no new C-17s bought in the FY 2011 or FY 2012 budgets. That would leave the USA with a total ordered fleet of 223, once they’re all under contract. At long last, they are.