As much as Hamas relies on Qatar for financial support and diplomatic cover, it is even more reliant on Iran, which provides military know-how, arms, and its now-diminished ability to attack Israel with its proxy forces. Tehran was also responsible for the kidnapping of Elizabeth Tsurkov, and certainly had a say in her release. How did Iran, once an ally of the U.S. and Israel, become the world’s foremost sponsor of terrorism? And how did that transformation happen under America’s nose? The last question is at the heart of a new book by Scott Anderson. Ray Takeyh writes in his review: