This issue of Urban Ideas looks into detail at emerging tall building designs across Australia and the world. We have asked AvLaw, experts in giving advice on aircraft related issues with tall buildings, and to explain PAN-OPS and OLS in simple terms. An analysis of the new wave of tall this buildings in New York is given by urban designer Vernon Daal and this issue profiles a number of proposed tall buildings by Urban Taskforce members including Leandlease, Walker Corporation, Dyldam and Holdmark.