Three suspected members of a neo-Nazi group appeared in a Maryland court on Thursday to face federal charges after the FBI arrested them for carrying an assault rifle and planning to incite violence at a gun-rights rally in Virginia. Earlier on Thursday, the FBI arrested the trio: Brian Lemley, 33, a former cavalry scout in the U.S. Army; Patrik Mathews, 27, a combat engineer in the Canadian Army Reserve who authorities said had illegally entered the United States; and William Bilbrough, a teenager who prosecutors called a serious flight risk, saying he expressed a desire to fight with Ukrainian nationalists.