Editor,—The development of the US Federal Aviation Administration policy to prohibit smoking in both the passenger cabin and flight deck of scheduled passenger flights1 2 offers lessons that may be considered in other countries and workplace settings. This policy was driven by the findings that environmental tobacco smoke (ETS) is a serious health risk to those exposed, that aircraft air quality was adversely affected by cigarette smoke, and by frequent complaints of respiratory irritation by crew and passengers.3-5 Similar concerns have been raised in other occupational settings such as prisons.6 The development and implementation of the policy, however, was slowed and complicated by fears that prohibiting smoking might adversely affect pilot performance. This summary of the policy development and the cited references may be useful in other efforts to develop …