Al-Qaeda in the Arabian Peninsula has emerged as one of the most dangerous al-Qaeda affiliates, strengthening amid political unrest in Yemen. 

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.

China’s colossal infrastructure investments may usher in a new era of trade and growth for economies in Asia and beyond. But skeptics worry that China is laying a debt trap for borrowing governments…