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u.s. air force secretary frank kendall pointed out that the u.s. air force needs to rapidly modernize, eliminate old aircraft and upgrade its fleet to adapt to the new battlefield environment. he stressed that modernization does not only mean deploying new aircraft, but also upgrading the entire aircraft system, including electronic warfare, battle management, intelligence and network capabilities.

kendall believes that traditional fighters have difficulty fighting against complex air defense systems, especially in terms of radar, data fusion, situational awareness and connectivity. the united states needs stealth aircraft that can evade detection, as well as aircraft with sufficiently advanced radar and missile systems that can rival fifth-generation fighters to deal with new threats.

the f-22 raptor stealth fighter is still the world's preeminent air superiority fighter, and the f-35 fighter has also demonstrated strong capabilities with its radar, data fusion, situational awareness and connectivity. however, old equipment still accounts for the majority of the us air force fleet, which has become a key challenge facing the transformation of the us air force.

u.s. military planners are grappling with this force composition issue, hoping to replace retired aircraft with advanced systems and trying to convince lawmakers to make the fleet more "durable." they are exploring new paths to prepare for changes on future battlefields.