CNN By Jack Forrest, CNN (CNN) — The FBI arrested a man on Saturday after he allegedly made plans to attack churches in Idaho and pledged his allegiance to ISIS, the Justice Department said. Alexander Scott Mercurio, 18, was charged with attempting to provide material support or resources to a designated foreign terrorist organization, according Read this story at KTVZ , KEYT , KEYT , KIFI , KIFI , KTVZ