Steve Simon writes in favor of trying Khalid Shaikh Mohammed--the self proclaimed mastermind of the 9/11 attacks--in a federal court in New York City and refutes the many criticisms of this option.

Najwa and Omar bin Laden--first wife and fourth son of Osama bin Laden--paint a "horrifying portrait" of one of the greatest criminals of our time, writes Thomas Lippman in his review of their book, "Growing Up Bin Laden." Written with Jean Sasson, the book provides intimate details about the bin Ladens' family life but does not add much to our understanding of al-Qaeda, says Lippman.

Gen. David Petraeus has created a broad new agenda that echoes many of the sentiments expressed by Barack Obama, while seemingly strayingaway from the close military relationship that once paired him with President George W. Bush.

Steve Coll of the New America Foundation says political changes in Pakistan and the weakening in al Qaeda may make Osama bin Laden's capture more likely.

Mohamad Bazzi, former Middle East correspondent for Newsday, says evidence suggests Israel’s intelligence agents as the most likely source of the bomb that killed Hezbollah terrorist chief Imad Mugniyah, but other scenarios also are feasible.

Imad Mughniyeh's killing “was the first major attack against a Hezbollah leader since Israel assassinated the group’s secretary-general in 1992,” reports Mohamad Bazzi.

Examining the life and tactics of Imad Fayez Mugniyah, the Hezbollah military mastermind killed in Damascus on February 13, 2008. Before 9/11, Mugniyah was said to be responsible for the deaths of more Americans than any other terrorist.

This Special Report from BBC News provides the newest updated information on the status of al-Qaeda suspects.

Michael Scheuer, former head of the CIA unit responsible for tracking Osama bin Laden, discusses al-Qaeda's cadre of new leaders.

Jarret Brachman, who tracks terrorist ideologies at West Point's Combating Terrorism Center, says al-Qaeda's figureheads are not among the most influential jihadi thinkers.

A Washington Post feature that details how the organization of the 33-year-old Shiite cleric Moqtada al-Sadr functions as an alternative government in Baghdad’s Sadr City, offering jobs and relief where the official government of Iraq does not function.

Chechen separatist Shamil Basayev is one of several rebel leaders to die violently in recent years. His death leaves the future of the movement in doubt.

From his exile in Syria, Khaled Meshal, the top ranked member of Hamas, exercises leadership and serves as the group's diplomatic envoy.

Andrei Babitsky of RFE/RL, one of the few journalists to have met and interviewed Chechen rebel leader Shamil Basayev, says his death may weaken the Chechen separatist movement, but will not kill it.

Shiite-Sunni relations have become frayed since the war in Iraq and the rise of Sunni insurgents like Abu Musab al-Zarqawi. The outcome of the war will have widespread consequences for the future of Islam's followers.

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 significance of his appointment.

The death of Abu Musab al-Zarqawi, Iraq's most wanted man, is an important event but one unlikely to affect the insurgency greatly.

Steven Simon, CFR Senior Fellow for Middle Eastern Studies, speaks about the death of al-Qaeda in Iraq leader Abu Musab Zarqawi and what it means for the future of Iraq and the "war on terror."

The USIP published a profile of Zarqawi before his death. Hind Haider includes some useful information on the motivations of al-Queda in Iraq and the element of anti-Shia sentiment in the insurgency.

A profile of Abu Bakar Bashir, the Indonesian cleric whose fiery invectives have motivated terrorist attacks like the 2002 Bali bombings, and who some experts say is affiliated with al-Qaeda.