Introduction of the <a href="https://en.wikipedia.org/wiki/Lockheed_Martin_F-22_Raptor" id="mwAVY" rel="mw:WikiLink" title="Lockheed Martin F-22 Raptor">Lockheed Martin F-22 Raptor</a> into <a href="https://en.wikipedia.org/wiki/United_States_Air_Force" id="mwAVc" rel="mw:WikiLink" title="United States Air Force">USAF</a> active service.