In 1888, Katz’s Deli opened on New York City’s Lower East Side. A century after it adopted its current name, the Obama administration began investigating it and other popular restaurants. Most people know Katz’s from a memorable scene in When Harry Met Sally, but earlier generations on the Lower East Side knew it for its ‘Send a Salami to Your Boy in the Army’ campaign during WWII when the owner’s three sons were all serving on the front lines. Presidents, from FDR to JFK to Reagan, members of Congress and all sorts of politicians stopped by for a snack and...