Washington has done well targeting Tehran’s shipping, banking and financial networks. The regime is increasingly being pushed onto costlier land routes. But some countries are leaving one major artery relatively open to Iran: the sky. Turkey is among the worst offenders; Washington needs to rein it in. After Iran reopened …

Two former senior U.S. officials look back at what the ceasefire has produced—and failed to produce—in its first year of implementation, focusing on the underused leverage provided by the July 30 “roadmap” agreement with Hamas. This essay serves as an introduction to a special Washington Institute series analyzing the risks …

Despite a new textbook, an influx of Russian teachers and managers, and an end to the teaching of Ukrainian, the Kremlin is unlikely to have “reprogrammed” locals. In the four-and-a-half years it has controlled southeastern Ukraine, Moscow has established a new education system. Those in charge seek to ensure this …