Counterterrorism expert Daniel L. Byman says Hezbollah is "the most powerful single political movement in Lebanon" and remains a potent guerrilla force.

A profile of three IRA splinter groups that remain active in Northern Ireland.

Hamas had a historic opportunity this week. By sending Carter home essentially empty-handed, Hamas allowed Israel and the Bush Administration to declare his mission a failure—and squandered a crucial opening, says Mohamad Bazzi.

The Palestinian Islamic Jihad is an Iranian-inspired Islamic militant group that aims to derail the Israeli-Palestinian peace process and eliminate Israel from the region.

The al-Aqsa Martyrs Brigade is a secular network of Palestinian militias aligned with Fatah that engages in sporadic violence against Israel.

A Colombian incursion into Ecuador sparks a regional diplomatic crisis at a time of increased arms spending across South America.

Francisco R. Rodriguez, an expert on Venezuelan affairs, says the show of force by Venezuelan President Hugo Chavez after the Colombian incursion into Ecuador is an attempt to bolster his declining popularity at home.

This report examines a publishing consortium developed by Jemaah Islamiyah (JI), Indonesia’s most prominent extremist organisation.

Osama bin Laden's top deputy, former Egyptian doctor Ayman al-Zawahiri, is taking questions from his friends and enemies alike on four al-Qaida-sanctioned jihadist Web sites. Providing a one-off advice column is just one way in which the international terrorist organization has adopted Web 2.0.

Colombian President Alvaro Uribe was hailed for his plan to demobilize the country’s paramilitaries, but observers warn the groups are reforming under a different guise.

Boston University’s Center for International Relations’ Director, Husain Haqqani talks about Pakistan’s new army chief, General Ashfaq Pervez Kiyani.

Advocating for greater Kurdish autonomy through violent resistance, the Kurdistan Workers Party remains a vibrant militant presence on the border of northern Iraq and southern Turkey.

Listen to Bruce O. Riedel, senior fellow at the Saban Center for Middle East Policy at the Brookings Institution, and Lawrence Wright, staff writer for the New Yorker, discuss the continuing influence of Al-Qaeda and whether the United States has fully understood and adequately combatted the threat of global terrorism.

An overview of the Fatah al-Islam terrorist group.

In this Foreign Affairs-sponsored call, Al-Qaeda Strikes Back author Bruce Riedel argues that al-Qaeda is trying to lure the United States into a war with Iran and that Osama Bin Laden's group now has more bases, more partners, and more followers today than it did on the eve of 9/11.

With suicide attacks up and the growing use of chlorine bombs, al-Qaeda in Iraq looks increasingly emboldened. But reports are surfacing of rifts among its factions.

Steven A. Cook, a CFR expert on Turkey, says “the great underreported story” of the Iraq war is the serious deterioration in U.S.-Turkish relations. “It has already blown up,” says Cook.

Oil piped through the swamps and creeks of the Niger Delta powers Nigeria’s economy, but ecological devastation and pervasive poverty are stirring political unrest.

Contrary to President Bush’s claim last year that al-Qaeda is “on the run,” new intelligence suggests the organization has regrouped, reestablishing a chain of command and opening new training camps.

Terror incidents related to the territorial dispute over Kashmir draw global attention, but an increasingly virulent Maoist insurgency appears to pose bigger security risks for India.