DUBAI: Qatar-based Al-Jazeera television on Friday aired a video of Al Qaeda number two Ayman al-Zawahiri vowing to avenge the death of the network's Iraq front man Abu Musab al-Zarqawi, killed in a US air raid on June 7. "Yes O Bush, none of us is killed without us avenging him, with the help of God," said Zawahri, who addressed US President George W Bush and was speaking to the backdrop of a picture of Zarqawi. He said Zarqawi "died under bombardment" and not in hiding, and never shed his "explosives belt".