Which major design change did Delta Air Lines make to its logo during its comprehensive rebranding in 2007?

Test your knowledge of how airline brand identities have transformed over the decades! This trivia question explores how one of the world's most recognizable airlines adapted its visual identity to changing design trends and business transformations. Airlines invest millions in their branding as it represents reliability, safety, and customer experience at 30,000 feet. How well do you know the history behind these iconic symbols of air travel?

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Added a triangular 'widget' symbol representing the Greek letter Delta
Introduced a blue globe symbolizing worldwide connections
Replaced the airline name with just a stylized 'D' in red and blue
Added wings to both sides of the company name