For the second time in 10 days, a man in a white surgical mask terrified Japan. This time the target of the mysterious assailant was carefully picked: Takaji Kunimatsu, chief of the country's 220,000-strong police force and the man in charge of investigating the deadly poison-gas attack in Tokyo's subway.
Kunimatsu was right on schedule when he left his apartment last Wednesday morning, just after 8:25. As usual, he took the elevator down to the lobby, met his aide and started to walk across the tiled entry toward his chauffered car. At that moment, a gunman hiding behind a utility pole...