Nick Xenophon, the Independent Senator for South Australia, writes: Re. "Tips and rumours" (yesterday, item 8). In yesterday's edition there was an item titled "Appeals to Canberra by air traffic cops" in the "Tips and Rumours" section. The article quoted verbatim an email sent to my office by a concerned air traffic controller, which I subsequently asked questions about at Estimate Hearings on May 26th.