No BUT, but ALTHOUGH
Al-Zarqawi's death is a significant blow to al-Qaida and another step toward defeating terrorism in Iraq. Although the designated leader of al-Qaida in Iraq is now dead, the terrorist organization still poses a threat as its members try to terrorize the Iraqi people and destabilize their government as it moves toward stability and prosperity.
That seems to me that he's saying "This is good, but it aint over"
fire that liberal moonbat General Casey right now!