The World Health Organization has gained prominence for its success in battling diseases such as polio and malaria, but is challenged by an unwieldy mission and strained resources in a landscape of competing organizations.

As world leaders prepare to convene for the sixty-seventh session of the UN General Assembly, they will face renewed calls for UN recognition of Palestine and a redoubling of diplomatic efforts in a volatile Middle East.

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.

Interest in natural gas is growing for political, environmental, and economic reasons. But the industry faces challenges to adding pipelines, increasing international LNG trade, and exploiting newly found shale gas reserves.

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.

Ayman al-Zawahiri, now America's most wanted terrorist, took over as the head of al-Qaeda in June 2011 after the killing of erstwhile head Osama bin Laden.

The International Monetary Fund, both criticized and lauded for its efforts to promote financial stability, finds itself again in the forefront of global economic crisis management. This Backgrounder examines the Fund's history and role.

Global food prices are being driven up by a number of factors including bad weather, low stocks, and unstable commodities markets. Combating price volatility and protecting food security will take increased agriculture production and better food distribution, experts say.

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.

Though shifts in demand and reduced production by some major producers have influenced oil prices, investor behavior is also increasing market volatility.

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 brutality of the Qaddafi regime and the subsequent debate over a no-fly zone has again spotlighted the UN's "Responsibility to Protect" doctrine. Using it for military intervention remains highly contended, but even humanitarian intervention is resisted by countries who see it as a threat to sovereignty.

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.

The Gulf of Mexico oil spill spotlights the growth of deepwater drilling and the challenges of balancing strong environmental regulation with efforts to expand U.S. domestic oil production.