Osama bin Laden will issue a videotaped message paying tribute to slain al-Qaida in Iraq chief Abu Musab al-Zarqawi, a message posted on an Islamic militant Web site said. The message posted Wednesday did not say when the video would be posted or whether bin Laden himself would appear in the video or just speak in a voice-over. The al-Qaida leader has issued three audiotapes this year but has not appeared in a video since one issued on October 29, 2004. A similar "advertisement" was issued for an al-Zarqawi tribute put out last week by bin Laden's deputy, Ayman al-Zawahri. That advertisement appeared on the Web a day before the video was posted on Friday.