Who Bombed the Istanbul Airport?

When ISIS fighters killed a hundred and thirty people in Paris, in November, the group’s leaders in Syria took credit for the attack the next morning. When ISIS zealots murdered thirty-two in Brussels, in March, the group claimed responsibility the same day. After the attacks in San Bernardino and Orlando, ISIS’s leaders took credit for both, even though they appeared to play little or no role in helping to plan or carry them out.