Debating global warming policy has moved to the top of agendas worldwide, but some skeptics still question whether action is necessary or possible.

The debate over defense spending will be more contentious than usual as the annual budget process ramps up in Washington.

As the Obama administration finalizes its first defense budget, analysts say near-term growth will be followed by lean spending amid the worst economic crisis since the Great Depression.

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

China’s rapid economic development has been fueled in large part by a massive migration of rural workers to cities and industrial zones. Young, poorly educated, and highly mobile, these workers conti…