The Spark That Will Ignite a Lebanese Civil War?

The assassination of Lebanon's intelligence chief over the weekend was more than personal score-settling by the Syrian regime or Hezbollah. It uncovered a battle that has been raging in the country for months.

On one occasion, the intelligence chief of the Lebanese Interior Ministry, Brig. Gen. Wissam al-Hassan, had a lucky escape. On February 14, 2005, he did...