Which famous WWII fighter aircraft was marketed by its manufacturer as 'The Sky's the Limit' in its promotional materials to military procurement officers?

The military industrial complex isn't just about creating effective weapons - it's also about branding and marketing. Throughout history, defense contractors have developed sophisticated brand strategies and product designs that have become iconic. From the silhouette of a Spitfire to the distinctive profile of an M16 rifle, these products have stories, marketing campaigns, and careful design considerations behind them. Test your knowledge about the commercial side of military hardware!

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P-51 Mustang (North American Aviation)
Supermarine Spitfire (Vickers-Armstrongs)
F4U Corsair (Vought)
P-38 Lightning (Lockheed)