Yup, CCX beat me to the punch, 9' winglets on the C-17.

Fuel is definitely a problem in the military. I have seen a 180 in regards to fuel planning for a typical mission. They are much more concerned (as they should be) at saving fuel. Before prices went high, you could pretty much get away with anything, with only the weakest of excuses. Lately they have been holding our feet to the fire more and more on landing with excess gas.