To celebrate the National Park Service’s 100th anniversary, the Philadelphia Flower Show—its 188th—brings the country’s greatest natural treasures together under one roof. Park enthusiast Brad Maule laces up his boots and hits the Flower Show trail

On the 12th anniversary of a tourist striking the Liberty Bell with a hammer, Brad Maule talks with the man who did it, and examines where the bell—and what it represents—have come in the years since