About a year before anybody had heard of “Ferris Bueller’s Day Off,” Steve Gianni was one of those who wondered, day after day, why the words “Save Ferris” had suddenly appeared, in huge black letters, on Northbrook’s water tower. “I remember driving to work and thinking, ‘What the hell does that mean?’” he said. “It … Continue reading As Ferris Bueller turns 30, Northbrook invites the world to sit and look at his favorite water tower