Original sentence: Negotiations between the Department of Defense and FAA during the 1970s resulted in FAA taking responsiblity for tracking of aircraft and feeding of radar data directly into the Region Operation Control Centers (ROCC) in what was to become the  Joint Surveillance System (JSS)
Edited sentence: Negotiations between the Department of Defense and FAA during the 1970s resulted in FAA taking responsibility for tracking of aircraft and feeding of radar data directly into the Region Operation Control Centers (ROCC) in what was to become the  Joint Surveillance System (JSS)