NASA held a news conference at the Newseum, in Washington, D.C. regarding the missing tapes on July 16, 2009 – the 40th anniversary of Apollo 11's launch from Cape Kennedy. The multinational research team looking into the missing tapes—mostly retired engineers who had worked on the original broadcast in 1969—was represented at the event by Richard Nafzger from the Goddard Space Flight Center and Stanley Lebar, the former lead engineer at Westinghouse who developed the Apollo Lunar Camera and the Apollo Color Camera. They concluded that the data tapes—with the SSTV signal—were shipped from Australia to Goddard and then routinely erased and reused a few years later. Australian backup tapes were also erased after Goddard received the reels, following the procedures established by NASA. The SSTV signal was recorded on telemetry data tapes mostly as a backup in case the real-time conversion and broadcast around the world failed. Since the real-time broadcast conversion worked, and was widely recorded on both videotape and film, the backup video was not deemed important at the time. In the early 1980s, NASA's Landsat program was facing a severe data tape shortage and it is likely that during this period the tapes were erased and reused.