Officials want to divest 33 of the service’s oldest F-22s and use that money to instead research cutting-edge combat jet designs under the “Next-Generation Air Dominance” program. If Congress approves the idea, it would send all but three Block 20 Raptors to the “boneyard” at Davis-Monthan AFB in Tucson, Arizona, and shrink the overall fleet from 186 to 153 fighters.