NZ On Air is such a part of the media mix in this country - the major funder of New Zealand's most important TV shows, not to mention RNZ, web-series and a lot of our music output - that it's hard imagining what life was like before it. But this month NZ On Air is celebrating 30 years of getting our stories seen and heard on air. Simon Morris talked to two CEOs, past and present, a couple of days ago - a day, in fact, before the announcement that TV3 was about to be sold off, changing the media landscape yet again. Current CEO Jane Wrightson and former CEO and now Chair of the NZ On Air board, Ruth Harley look back at the early days, and look forward to more changes in the future.