The FIA introduced a mandatory titanium-carbon fibre "halo" cockpit protection structure for the 2018 Formula One and Formula 2 championships. Surtees's fatal impact was one of many simulated with the halo device, and the FIA concluded that Surtees's outcome likely would have been improved by the presence of a halo. The utility of the halo, controversial when introduced, was borne out in the 2018 Belgian Grand Prix, when a wheel from the spinning and airborne car of Fernando Alonso solidly struck the halo structure of Charles Leclerc's car. The halo was credited with potentially preventing a serious injury to Leclerc, if not outright saving his life.