Numerous variants are already generated in excess of the fighter’s lifespan. These have incorporated the T-45A, that is a two-seat variant also employed by the US Marines, and also the T-45C, an upgraded Model by using a glass cockpit and other augments, which currently serves like a design for T-45s https://telegra.ph/A-Secret-Weapon-For-world-war-2-fighter-planes-american-09-18