With the retirement of the F-15A and B models, the F-15C and D models are supplemented in U.S. service by the newer F-22 Raptor. , regular Air Force F-15C and F-15D fighters are based overseas with the Pacific Air Forces at Kadena AB in Japan and with the U.S. Air Forces in Europe at RAF Lakenheath in the United Kingdom. Other regular Air Force F-15s are operated by ACC as adversary/aggressor platforms at Nellis AFB, Nevada, and by Air Force Material Command in test and evaluation roles at Edwards AFB, California, and Eglin AFB, Florida. All remaining combat-coded F-15Cs and F-15Ds are operated by the Air National Guard.