Al Qaeda's second-in-command Ayman al-Zawahri vowed revenge for the killing of a top group commander in a suspected US attack in Pakistan, in a video posted on the Internet on Wednesday.
"No chief of ours had died of a natural death, nor has our blood been spilled without a response," Zawahri said in the video posted on an Islamist Web site, referring to the killing of Abu Laith al-Libi. (Reuters)