Al-Qaeda in the Arabian Peninsula has become the most dangerous al-Qaeda affiliate and is attempting to exploit the ongoing political unrest in Yemen. This Backgrounder profiles the group and looks at U.S. counterterrorism operations against its members.

An undervalued Chinese yuan remains a contributing factor to the U.S.-China trade imbalance, but experts warn that labeling China a "currency manipulator" will not rein in mounting U.S. deficits.

Sharia, or Islamic law, is increasingly in the spotlight as its political and economic role expands in the Muslim world and even in the West.

The U.S. government designates Iran as the "most active state sponsor of terrorism," which feeds concerns about Iran's growing nuclear program.

The longstanding U.S.-South Korea alliance, created as a bulwark against a communist North Korea, has expanded to include tighter trade ties and cooperation on global issues from climate change to international development.

In the wake of financial regulatory overhaul, experts continue to differ on the role of the Federal Reserve and its powers.

Ten years after being toppled from power in Kabul, the Taliban remains resilient in Pakistan and Afghanistan, and complicates U.S. efforts to wind down the Afghan war.

Pakistan has emerged as a terrorist sanctuary for some of the world's most violent groups, including al-Qaeda, the Taliban, and homegrown militants, that threaten the stability of Pakistan as well as the region.

Damage to Japan's Fukushima Daiichi nuclear power plant has reignited debate over the safety of nuclear power and highlighted questions over aging power plants, safety procedures, and waste disposal.

A decade after 9/11, U.S. Muslims grapple with their place in American society in the face of concerns about homegrown terrorism and questions by non-Muslims over the threat they might pose.

The global drug industry has fought to prevent developing nations from making low-cost, generic versions of drugs under patent, but the demand for such alternatives is could rise with increasing healthcare costs and growing incidence of chronic disease.

A profile of the international terrorist network that the United States has singled out as the most serious threat to U.S. security.

Western Europe's burgeoning Islamic population continues to spark concerns about Muslim assimilation and a cultural divide.

The dispute between President Obama and Congress over the legality of the U.S. military intervention in Libya has spurred new debate on the power of presidents to make and prosecute wars.

Mideast upheaval was a top issue at the G8, which is winding down today in France, along with nuclear safety, leadership of the IMF, and aid to Africa. This Backgrounder profiles the eight participants and their priorities.

Foreign governments, non-state actors, and criminal networks are targeting the digital networks of the United States with increasing frequency and sophistication. U.S. cybersecurity has made progress, but relies heavily on the private sector to secure infrastructure critical to national security.

Pakistan is bracing for more turbulence in the wake of Osama bin Laden's killing. This Backgrounder looks at how state support for Islamist militants has led to growing religious intolerance in society.

Pakistan's intelligence agency, the ISI, faces persistent accusations of links to terrorism, despite repeated denials.

The scramble for energy alternatives has brought new focus on nuclear power in the United States, but its revival faces political and practical obstacles.

Violent acts by homegrown militant extremists in the U.S. have declined, but "lone wolf" attacks are on the rise. The post-9/11 legal and political landscape poses new challenges to law enforcement authorities seeking to prevent such attacks.