A state of emergency in Nigeria's northeast signals that Islamist violence and the government's brutal response have rendered the region ungovernable, says CFR's John Campbell.

Elliott Abrams discusses the latest House hearing on the Benghazi embassy attack of September 11, 2012.

Stewart Patrick and Alexandra Kerr make recommendations to improve the counterterrorism efforts of the United States and its allies, in conjunction with CFR's Global Governance Report Card, published by the International Institutions and Global Governance program.

The article also provides a detailed case study of Hossam Yaacoub—the convicted Hizb Allah operative now serving time in a Cypriot prison for his role in a plot targeting Israeli tourists—to show how Hizb Allah has resurrected its terrorist capabilities. Drawn from the police depositions of interviews with Yaacoub after his arrest, the case provides unique insights into how Hizb Allah recruits and trains new operatives.

The Boston Marathon bombings illustrate the stresses on domestic intelligence gathering and counterterrorism in a democratic system, says CFR's Richard Falkenrath.

Julia Sweig reflects on implications of the Boston Marathon bombings in the midst of debates on gun control and immigration reform.

Micah Zenko reflects on the purpose and implications of investigating motivations behind terrorist attacks.

According to Ed Husain, "the answers to countering the appeal of radicalism among some Muslims in the West rests in more, not less, debating of religion, pluralist politics and integrating immigrants."

Ed Husain writes, "Boston will not be the last homegrown terror attack. Bombastic statements and burying our heads in the sand do not prepare us for future attacks."

U.S.-EU cooperation against terrorism has led to a new dynamic in U.S.-EU relations by fostering dialogue on law enforcement and homeland security issues previously reserved for bilateral discussions. Nevertheless, some challenges persist in fostering closer U.S.-EU cooperation in these fields. Among the most prominent are data privacy and data protection concerns.

The FBI released several documents and updates on their investigations on the Boston Marathon bombings, including a 2011 request from a foreign government on information about Tamerlan Tsarnaev.

In light of the terrorist attack at the 2013 Boston Marathon, Max Boot writes, "Keep calm and carry on."

Gayle Tzemach Lemmon reflects on the terrorist bombing at the Boston Marathon.

A panel of experts discuss the new HBO documentary film, Manhunt, which details the hunt for Osama bin Laden.

President Obama gave a speech on April 15, 2013, after explosions went off near the finish line of the Boston Marathon. In a second speech on April 16, he said the case will be investigated as an "act of terrorism" and on April 19, he discussed the federal and local coordination in locating and taking into custody one of the suspects and in collecting intelligence.

Linda Robinson writes that the upcoming anniversary of Osama bin Laden's death highlights the continued need for a "more comprehensive approach to special operations as part of U.S. national security policy."

"While it was not the first country where the United States used drones, [Pakistan] became the laboratory for the targeted killing operations that have come to define a new American way of fighting, blurring the line between soldiers and spies and short-circuiting the normal mechanisms by which the United States as a nation goes to war."

What is the Obama administration's legal justification for targeted killings? CFR national security expert John Bellinger explores this question as well as others with significant implications for U.S. counterterrorism.

Elliott Abrams forecasts "trouble ahead" in Europe, once its passport-holding jihadis return home from fighting in Syria.