Egyptian Islamic Jihad
Ayman al-Zawahiri was the second and last "emir" of Egyptian Islamic Jihad. In 1998 al-Zawahiri formally merged Egyptian Islamic Jihad into bin Laden's organization. He is often described as a "lieutenant" to Osama bin Laden, though bin Laden's chosen biographer has referred to him as the "real brains" of al-Qaeda. Ayman al-Zawahiri is believed to be hiding in Pakistan's Federally Administered Tribal Areas by some analysts while other observers believe he might be hiding in major urban areas in Pakistan or elsewhere.