To this day, the MiG-25s are still in service While most of these have been upgraded to the MiG-31. Pavlecka fulfilled with Jack Northrop the next day, and gave him the USAAC specifications. Northrop in contrast his notes with These of Pavlecka, noticed the similarity among the USAAC's requirements and https://www.webwiki.ch/kowear.com/american-fighter/