– Mercedes boss Toto Wolff believes Formula 1's governing body, the FIA, had "no choice" but to introduce the 'halo' head protection device for the 2018 season.Formula 1 has strived to increase head protection available for drivers, and last year extensively trialled the halo, a device which wraps around the cockpit in the form of three struts.The introduction of the halo was planned for 2017 but this was delayed, in order for further evaluations to take place, while a canopy-like device, dubbed the 'shield', emerged as a potential alternative.The shield was sampled by Sebastian Vettel during practice for the British Grand Prix but it was removed after just one lap,...
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