Terrorist attacks and an emergent Russia are posing new challenges to Turkey’s energy strategy, but some analysts warn it could be Western Europe that gets squeezed.

As the United States looks to reform its health care system and expand access to the uninsured, countries that have moved toward universal health care may offer lessons.

Democratic congressional leaders say improving energy security is a priority. But while there is broad interest in lessening U.S. dependence on foreign oil and in promoting renewable fuels, comprehen…

President Barack Obama says he will seek vigorous climate-change policy. Efforts to curb greenhouse gases pose considerable economic pitfalls, as well as opportunities.

China’s anti-satellite test in January drew international condemnation but also piqued interest in some quarters about instituting a space weapons ban.