The northeastern Iowa town of Masonville is marking its centennial today with a celebration. Terese Greve, one of the festival organizers, says the town is small today, but it was once a thriving community that was an important shipping point between Chicago and Sioux City.Greve says plenty of family fun events are scheduled for today, in addition to somber ceremonies marking this week’s terrorist attacks.Other activities include a volleyball tournament, a horseshoe tournament, a petting zoo, “old timers” softball games, a car cruise, a quilt display and a dance and fireworks display tonight. The Masonville logo will also be on display — and for sale — on a crockpot.Masonville’s population is about 130. The Delaware County town is about half way between Dubuque and Waterloo.