Al-Qaida's No. 2 said the terror network's branch in Iraq had succeeded in "breaking the back" of the US miltary with hundreds of suicide bombings, in a video posted Saturday that was the latest in a string of new messages by al-Qaida's leaders. The video by Ayman al-Zawahri, posted on an Islamic militant Web forum, came within the same week as an audiotape by al-Qaida's top leader Osama bin Laden and a video by the head of al-Qaida's branch in Iraq - a volley of messages by the group's most prominent figures. Al-Zawahri, an Egyptian militant believed to be hiding in Afghanistan or Pakistan, also denounced the leaders of Egypt, Jordan, Saudi Arabia and Iraq as "traitors" and called on Muslims to rise up to "confront them." He said that US and British forces in Iraq had bogged down in Iraq and "have achieved nothing but loss, disaster and misfortune."