Which major airline underwent a controversial rebrand in 2013, replacing its iconic 38-year-old logo with a simplified geometric design that was criticized for losing the brand's heritage?

The visual identity of transportation companies often evolves to reflect changing market conditions, technological advancements, or corporate repositioning. These logo transformations can reveal fascinating insights about a company's history and strategic direction. Test your knowledge about a significant brand identity shift in the transportation industry that sparked considerable discussion among design experts and consumers alike.

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American Airlines (replacing the double-A eagle design with a simplified flight symbol)
Delta Air Lines (replacing its triangular widget with a spherical blue globe)
United Airlines (replacing its stylized U with a modernized continental globe)
Southwest Airlines (replacing its heart logo with an abstract wing design)