Which airline adopted the slogan 'Fly the Friendly Skies' after temporarily replacing it with 'Rising' during a major corporate restructuring?

Airlines invest millions in creating memorable brand slogans that capture their service promise and differentiate them in the competitive transportation market. These carefully crafted taglines become powerful marketing tools that passengers often recognize worldwide. Test your knowledge of these famous transportation branding elements that have shaped how we perceive different carriers. This question focuses on a major rebrand that accompanied a significant business transformation.

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United Airlines
Delta Air Lines
American Airlines
Southwest Airlines