Ayman al-Zawahiri leaves behind a robust network of strategically aligned but tactically independent al-Qaeda affiliates operating in Africa, Asia, and the Middle East.

Russia’s extraordinary show of force in and around Ukraine underscores the military imbalance between the two countries. 

The recent China-Solomon Islands security agreement has sparked concerns among the United States and its allies about a Chinese naval presence in strategically important waters. In response, Washingt…