Which major airline's logo features a 'Speedmark' that was specifically designed to symbolize movement through air and was introduced after a major corporate merger in 2010?

Test your knowledge about famous transportation brand logos and their evolution over time. Many transportation companies have changed their logos significantly as they've grown and adapted to modern markets. These visual identities often contain hidden meanings or strategic design elements that reflect the company's values, history, or future aspirations. How well do you know the stories behind these iconic transportation brands?

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United Airlines
Delta Air Lines
American Airlines
Southwest Airlines