Leadership:
The name is translated to "Al-Qaeda Organization in the Land of Two Rivers".  A Salafi movement organization directly tied to Al-Qaeda.  Has allegiance to Al-Qaeda leader Osama bin Laden, and has released a statement that they have officially joined the Al-Qaeda terrorist network (Al-Arabiyah television reported on 20 October 2004)
Activities:  The primary insurgency in vicious attacks on coalition forces.  As the Iraqi elections drew close, the group then switched to attacks on journalists and Iraqis.  By the time the elections were over, the group began to focus on any "collaborators" with the government or Coalition forces, with special attention to Shiites.  Remains today the most violent and active insurency group within in Iraq and has respsonded to Shiite militia's re-emergence with renewed vigor.
External Aid: Al-Qaeda
Strength:  speculation of 100-1000s
Links:  Al-Qaeda, possibly to several Jordanian underground organizations as well as Egyptian Islamic Jihad.

Egyptian born, was a senior Al-Qaeda leader in Iraq and is believed to have become the new leader following the death of Musab Al-Zarqawi in June of 2006.  Masri is believed to have been a member of the Muslim Brotherhood (both bin Laden and Al-Zawahiri were also members) as well as Zawahiri's Egyptian Islamic Jihad. In May of 2006, reports surfaced on his arrest. photo

Musab al-Zarqawi