Since the Islamic Revolution in 1979, Iran has been one of the world’s most active sponsors of terrorism. Tehran has armed, trained, financed, inspired, organized, and otherwise supported dozens of violent groups over the years. Iran has backed not only groups in its Persian Gulf neighborhood, but also terrorists and radicals in Lebanon, the Palestinian territories, Bosnia, the Philippines, and elsewhere. This support remains strong even today. It comes as no surprise then, that almost twenty five years after the revolution, the U.S. State Department still considers Iran “the most active state sponsor of terrorism.”