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 leaders of the United States, Australia, India, and Japan held their fourth Quad meeting in May. After a year dedicated to fighting the pandemic, here’s what they pledged to take on next.

Biden has moved to rejoin the Paris Agreement and the World Health Organization. They likely won’t be the last international agreements and institutions that the United States reenters.

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…