Facing a federal lawsuit accusing "America's toughest sheriff" of failing to cooperate in a Justice Department investigation into allegations of discrimination in his arrest of illegal immigrants, Sheriff Joe Arpaio on Wednesday unveiled a new armed "Immigration Posse" to combat illegal immigration in Arizona. Sheriff Arpaio, who heads the Maricopa County Sheriff's Office in Phoenix, said the new armed posse --- which includes Hollywood actors Steven Seagal, Lou Ferrigno and Peter Lupus --- could help his deputies enforce immigration laws in the state. But, more importantly, he said the new posse "would provide a means by which citizens could...