Five days after U.S. forces killed al-Qaeda in Iraq leader Abu Musab al-Zarqawi, the group announced his successor, the unknown Abu Hamza al-Muhajir. Speculation abounds about the man and the signifi…

Gen. David Petraeus’ assertions about falling casualties in Iraq are supported by a range of objective sources. But his testimony to Congress does not establish whether the decline is attributable to…

Since 9/11, much of al-Qaeda’s operational capacity has been dismantled but experts say the group’s strength now lies in its ability to inspire others to carry out terrorist attacks.