In an unprecedented move, US President Donald Trump has designated Iran's Revolutionary Guard a foreign "terrorist organization". It is the first time Washington has taken such a step with an arm of another country's military. The Trump administration says the Iranian force actively participates in, finances, and promotes "terrorism" as a tool of statecraft. Al Jazeera's Rosiland Jordan has more from Washington, DC. Subscribe to our channel: http://aje.io/AJSubscribe Follow us on Twitter: / ajenglish Find us on Facebook: / aljazeera Check our website: https://www.aljazeera.com/ #Iran #IranRevolutionaryGuard #StateDepartmentTerrorList