The Lockheed Martin FB-22 was a proposed stealth bomber aircraft marketed to the United States Air Force. Its design was derived from the F-22 Raptor. Lockheed Martin proposed its unsolicited design as a "regional bomber" to complement the aging U.S. strategic bomber fleet. Lockheed Martin appeared to suspend work on the concept following the 2006 Quadrennial Defense Review, which called for a new strategic bomber by 2018. Design and development In 2001, Lockheed Martin began studies on the feasibility of the FB-22 as the company sought to leverage the design and capabilities of the F-22 Raptor. Experience gleaned from Operation Enduring Freedom in Afghanistan demonstrated the value of a bomber that could remain in theatre in the absence of surface-to-air missiles. The F-22, while designed as an air superiority fighter, embodied some degree of air-to-ground attack ability. One primary objective of the internal studies was to exploit the F-22's air-to-ground capability while keeping costs to a minimum. To this end, the company devised several concepts that saw significant structural redesigns with respect to the fuselage and wings, while retaining much of the F-22's avionics. With an early design, Lockheed Martin lengthened and widened the fuselage to increase the internal weapons load; it was later found that doing so would have incurred a cost penalty of 25–30% in weight, materials and development. Instead, the company left the fuselage intact as it enlarged the wing to a more delta shape. The wing, which was around three times that of the F-22, enabled the storage of a much larger amount of weapons and fuel. Various figures give the payload of the FB-22 to be 30 to 35 Small Diameter Bombs; this is compared to the F-22's payload of eight of such weapons. Unlike the F-22, the FB-22 was designed to be able to carry bombs up to in size. With stealth, the aircraft's maximum combat load was to have been ; without stealth, . Range was almost tripled from to more than , which could have been extended by external fuel tanks. This placed the aircraft in the category of a regional bomber, comparable to that of the F-111, as it was intended to replace the F-15E Strike Eagle and take over some of the missions of the B-1 and B-2. According to Air Force Magazine, the combination of range and payload of the FB-22 would have given the concept a comparable effectiveness