Commentary

The vulnerability of the U.S. electrical grid was illustrated in 2003, when the largest blackout in US history left 50 million people in darkness.

Despite the challenges, Rio has accomplished more in the years preparing to host the Olympics than it could have without being awarded this international honor.

When Hillary Clinton chose Sen. Tim Kaine of Virginia as her vice-presidential running mate, some left-leaning groups were unhappy about his pro-trade leanings.

The Supreme Court’s decision on President Obama’s immigration plan ended in a split decision. That means the lower court’s ruling to block the plan stands.

Nearly 50 years ago, at the height of the Cold War, former U.S. ambassador to NATO Harlan Cleveland wrote a book called "NATO: The Transatlantic Bargain."

Although the departure of General Petraeus is a significant loss for the intelligence community, it is also an opportunity to better balance intelligence support for military and diplomatic operations.

Given the rising global threats, turning inward is a politically expedient platform. But overcoming global challenges requires trust and cooperation.

Ivo Daalder, former U.S. ambassador to NATO, explains why you should be concerned about Brexit. He speaks with Bloomberg's David Gura and Vonnie Quinn on "Bloomberg Markets."

What does Great Britain’s impending exit from the European Union mean for the United States and other countries across the globe?

While Americans favor nuclear energy in general, they are reluctant to developing new nuclear plants.