A subsequent USAF investigation blamed the accident on several factors. The F-15 pilots were faulted for misidentifying the helicopters as hostile. Also, the crew members of the AWACS aircraft were blamed for their inaction in failing to exercise appropriate control and for not intervening in the situation. In addition, the identification friend or foe (IFF) systems had not functioned to identify the helicopters to the F-15 pilots. Furthermore, USAF leaders had failed to adequately integrate U.S. Army helicopter operations into overall OPC air operations. As a result of the investigation several USAF officers received administrative discipline but only one, Jim Wang, an AWACS crew member, was tried by military court-martial, in which he was acquitted.