The International Labor Rights Fund in Washington has filed a federal suit against Firestone for what it calls "a gulag of misery" on the 200-square-mile estate, believed to be the largest rubber plantation in the world. The suit alleges that Firestone's Liberian employees are overworked, underpaid, and exposed to pesticides and other hazardous chemicals, and that they risk injury because of inadequate safety measures...The suit...names Nashville-based Firestone and its Japanese parent, Bridgestone Firestone...The company denies the allegations and has asked the judge to dismiss the case; a ruling is expected in early 2007.