The unprecedented Iranian attack on Israel presents U.S. officials with mounting challenges in trying to contain the conflict and maintain a deterrence against Iran and its allies.

The mass casualty theater attack in Moscow was a reminder that affiliates of the Islamic State have reorganized and infiltrated even powerful states.

An attack from Iran-aligned forces that killed U.S. service members near Jordan’s border with Syria risks direct U.S.-Iran conflict in a region already embroiled in widening violence.  

Iran has greeted the attack by Palestinian militant forces on Israel and with its backing of Hamas and Hezbollah has been working to coordinate pressure on Israel, threatening further escalation of t…

Canada’s stunning allegations of an India-directed plot to kill Sikh separatist Hardeep Singh Nijjar has stirred frictions between two major democracies and raised questions about India’s global acti…

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.

The Madrid summit paved the way for Finland and Sweden to join and underscored that Russia is NATO’s chief security threat. But the alliance’s new defensive efforts aren’t likely to change Putin’s st…