Editor’s Note: China’s huge population and spectacular economic growth since the 1980s at first gave rise to fears, and now a sense of inevitability, that China will surpass the United States in the 21st...

Editor’s Note: After the United States helped overthrow Muammar Qaddafi in 2011, Libya was put on the back burner of U.S. policy even as its problems mounted. Moments of horrific anti-U.S. violence, like...

Editor's Note: “Lone wolf” terrorists—those who strike on their own without links to an established organization—are a nightmare for counterterrorism officials. They have no ranks to be penetrated, and o...