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.

Secretary of State Hillary Clinton, a senator and former First Lady, has offered a tough pragmatism on national security matters and called for reviving U.S. credibility in the world.

China’s growing military capabilities pose a concern for U.S. security interests. Experts say the United States must push for greater engagement with China’s military to reduce the potential for misu…

As U.S. lawmakers debate a cap-and-trade policy to combat climate change, experts say coal will continue to be a major part of the world’s energy mix, which will likely complicate efforts to curb gre…

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