As the Air Force envisions a future fighter fleet, it wants to divest aging Block 20 F-22 Raptor jets to instead fund the modernization of more recent F-22 configurations, top service officials said today. The F-22 remains the service’s “premier” fighter, Chief of Staff Gen. David Allvin said at the annual Washington conference hosted by McAleese and Associates. But “there’s a block of the F-22 which is really lagging the rest of the F-22 force that we would not put...