Relations between the two countries, long bound by common interests in oil and security, have strained over what some analysts see as a more assertive Saudi foreign policy.

The U.S. Navy’s dominance of the world’s oceans has made it an indispensable foreign policy tool and a guarantor of global trade, but a mix of challenges is raising difficult questions about its futu…

A significant proportion of China’s population claims to follow a religion. However, the government continues to toughen oversight, increase persecution of some religions, and attempt to co-opt state…