JIM YARDLEY

The identification of Khalid and Ibrahim El Bakraoui as suicide bombers in the deadly Brussels attacks is confronting investigators and counterterrorism experts with a disturbingly recurrent question: Why do so many terrorists turn out to be brothers?

A Parisian year that began with the bloodshed and chaos of the terror attacks at the satirical magazine, Charlie Hebdo, and later at a Jewish grocery, now had an even deadlier coda: With events still fluid and exact details unclear, the authorities said more than 100 people had been killed in a series of attacks across Paris.

The International Monetary Fund said shortly after midnight Wednesday that Greece had missed a crucial debt payment to the fund.