This Oct. 21, 2016, file photo shows a Burger King restaurant logo in Philadelphia. Burger King has delivered its own hot take on a regulatory showdown that has enflamed the U.S., with a flame-grilled Whopper. The new ad has become a sensation, with more than a million views and counting on YouTube. In the ad, customers are told they will be charged different prices for a Whopper, depending on how fast they want it. (AP Photo/Matt Rourke, File)
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