Knotfest IowaAugust 17th, 2012Mid-America Motorplex, Pacific Junction, IADeftones, Dirtfedd, Lamb of God, Machine Head, Prong, Serj Tankian, Slipknot, The Urge Words and Photos by Adam Tibbott On August 17, 2012, thousands of Maggots descended upon Pacific Junction, Iowa, transforming quiet farmland into the epicenter of heavy music for the very