Which airline's 1967 logo redesign by Saul Bass featured the iconic 'widget' symbol that remained virtually unchanged for over 30 years and became one of the most recognizable transportation logos?

The transportation industry has seen numerous brand innovations over the decades, with airlines often leading the way in visual marketing and identity design. One particular airline made history with a revolutionary logo redesign that transformed the company's public image and set new standards for transportation branding. Test your knowledge about this influential moment in transportation design history!

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Delta Air Lines
Pan American World Airways
United Airlines
Continental Airlines