 The data collection capability of the E-3 radar and computer subsystems allowed an entire air war to be recorded for the first time.In addition to providing senior leadership with time-critical information on the actions of enemy forces, E-3 controllers assisted in 38 of the 41 air-to-air kills recorded during the conflict.NATO E-3s joined their USAF colleagues for joint air defense as part of Operation Eagle Assist in the wake of the September 11, 2001 terrorist attacks on the World Trade Center towers and the Pentagon.