There are 109 country flags lining the Benjamin Franklin Parkway. What happens when one of them starts to look a little worse for wear? A reader asked about how the iconic flags are maintained through Curious Philly, The Inquirer’s forum for answering queries of all kinds. As a refresher — the country flags were mounted along the road, which is modeled after Paris’ Champs-Élysées, in 1976 as part of the United States’ Bicentennial celebration. The flags are meant to represent all of the nations that have a significant population in Philly, plus Puerto Rico, which is the only flag representing...