Many post-World War II era air forces have been reluctant to adopt fixed-wing jet aircraft developed specifically for ground attack. Although close air support and interdiction remain crucial to the modern battlefield, attack aircraft are less glamorous than fighters, while air force pilots and military planners have a certain well-cultivated contempt for "mud-movers". More practically, the cost of operating a specialized ground-attack aircraft is harder to justify when compared with multirole combat aircraft. Jet attack aircraft were designed and employed during the Cold War era, such as the carrier-based nuclear strike Douglas A-3 Skywarrior and North American A-5 Vigilante, while the Grumman A-6 Intruder, F-105 Thunderchief, F-111, F-117 Nighthawk, LTV A-7 Corsair II, Sukhoi Su-25, A-10 Thunderbolt, Panavia Tornado, AMX, Dassault Étendard, Super Étendard and others were designed specifically for ground-attack, strike, close support and anti-armor work, with little or no air-to-air capability.