Fast food giant Burger King apologized Tuesday for an advertisement featuring a squat Mexican draped in his country's flag next to a tall American cowboy and said it would change the campaign. Mexico's ambassador to Spain said posters released in Europe for Burger King's new Tex-Mex style "Texican whopper," a cheeseburger with chile and spicy mayonnaise, inappropriately displayed the Mexican flag, whose image is protected under national law. The ambassador wrote a letter complaining to Burger King and requested the ad campaign be discontinued.