Four former militants appeared in shackles at a raucous court hearing today at San Francisco's Hall of Justice on charges that three of them murdered a San Francisco police officer in 1971 and the fourth took part in a larger conspiracy to target police. Many in the courtroom applauded as the alleged onetime members of the Black Liberation Army entered, triggering an immediate order by Superior Court Judge Donna Alyson Little to clear the court. As the defendants' attorneys objected to Little's order, the crowd -- now outside the courtroom -- chanted, "No justice, no peace.'' Eventually, Little relented and...