EUROCONTROL / FAA Action Plan 15 on Safety Research aims to advance safety concepts and practices in air traffic management, via the sharing of expertise from its membership. This White Paper seeks to answer a simple question put to those at the top of eight organisations who have invested in safety culture: was it worth it? We asked CEOs and other senior executives what their safety culture journeys were like, what they have learned along the way, and whether they intend to continue on this path.