The U.S. competitive advantage in space depends on infrastructure hosted by allies.

Terrorist groups are expanding their reach and affecting U.S. and other countries’ interests.

Understanding incels, school shooters, and the new category of terrorism, “nihilistic violent extremism.”

European countries are designating and prosecuting Hamas’s financial lifeline, but far more needs to be done.

Adversaries are using new technologies to disrupt commercial flight without escalating to broader conflict.

The challenges of the digital age require more partners to monitor fast-moving, global threats.

The United States cannot outcompete China alone and must reconceptualize its allies as co-producers of power.

The president’s threat to resume tests is the latest erosion of a long-standing norm.

The administration’s approach of “strategic uncertainty” is unlikely to produce better deals.

The nonproliferation regime remains strong—maybe even stronger than before.

Groups are increasingly using weaponized drones across the continent.

International law and U.S. policy leave room for pragmatic security policy.