Fort Worth, Texas-based American Airlines is celebrating a milestone anniversary at its sole Midwest hub. The legacy carrier marked seven decades of serving the Windy City on Wednesday.

It comes as the airfield at Chicago O'Hare International Airport (ORD) has been more of a battlefield in recent months. For decades, American has gone head-to-head with United Airlines , but the competition and rivalry seem hotter than ever.

History Meets Heritage

October 29, 1955 is not only a special day for American, but also for ORD itself. Trans World Airlines (TWA) operated the first passenger flight that officially opened ORD for commercial service. Following a dedication ceremony with around 23,000 people in attendance, TWA flight 94 took off for Charles De Gaulle Airport

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