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In this week\u2019s Flightless Bird, David Farrier looks at America\u2019s obsession with sandwiches. Why is Subway the United State\u2019s biggest fast food chain, leaving Starbucks and McDonalds in its wake? To get answers, David heads to Philly to investigate one of America\u2019s greatest inventions: The Philly Cheesesteak Sandwich. There he discovers two sandwich stores locked in a decades-long rivalry. What\u2019s the beef between Geno\u2019s and Pat\u2019s? And what of the man who supplies both stores with their tasty sodas? David also meets the man behind the popular Instagram account @SandwichesOfHistory, Barry, who recreates sandwiches of yore. Why were ancient sandwiches so disgusting? Why would someone combine peanut butter with tomatoes in a sandwich?\nLearn more about your ad choices. Visit podcastchoices.com/adchoices