Iran's Islamic Revolutionary Guard Corps shoots down an American RQ-4 Global Hawk spy drone after it allegedly violates Iranian airspace.
An Iranian Islamic Revolutionary Guard Corps weapons depot in Abu Kamal District, Deir ez-Zor Governorate, Syria, is hit by an airstrike. Arab media say Israel is behind the attack. The United States denies any involvement.
United States Secretary of State Mike Pompeo announces the designation of the entirety of Iran's Islamic Revolutionary Guard Corps as a Foreign Terrorist Organization (FTO), effective April 15. This will be the first time the United States has designated a part of another government as a terrorist organization.
The United States Treasury Department announces new sanctions on Iran central bank governor Valiollah Seif and assistant director Ali Tarzali for allegedly helping the Islamic Revolutionary Guard Corps and Quds Force support Hezbollah.
The Foreign Minister of Iran Mohammad Javad Zarif says that the country's missile program would not be up for discussion. This comes as United States Secretary of State John Kerry said last Thursday that the United States and its allies would only address Iran's concerns in the region if it makes it clear to all involved that it was prepared to cease provocative ballistic missile launches and tests.
Iran releases four Iranian-American prisoners including "Washington Post" reporter Jason Rezaian and Christian pastor Saeed Abedini. The United States is to release seven Iranian-Americans held in the United States for violating sanctions against Iran.
Iran seizes the crew of two small United States Navy boats near Farsi Island, in the Persian Gulf, after they had allegedly entered Iranian waters. Pentagon spokesman, Peter Cook, told Associated Press that Iran has assured the United States that the crew and vessels will be returned promptly.
Iranian Foreign Minister Mohammad Javad Zarif meets with U.S. Secretary of State John Kerry during P5+1 and Iran talks, the highest-level direct contact between the United States and Iran in six years.