William Roy, at the time in charge of the Australian Broadcasting Commission’s radio and television transmitters in Canberra, was employed to supervise the installation of technical equipment in the Tower and became its first Principal Technical Officer. In 1991 Roy gave an interview to Jana Wendt, where, according to his son, he discussed the existence of a secret surveillance centre within the tower that was part of the surveillance program later revealed to be ECHELON. A short excerpt of the interview was aired as a preview of the upcoming report, however before the full interview could air a D-Notice was placed on it, barring it from broadcast.