When did the US put sanctions on Iran?

Related questions

1. What did the INF Treaty do?
2. Is Crimea a sanctioned country?
3. What did the Start treaty do?
4. Which country has anti ballistic missile?
5. How many nuclear power plants are in Iran?
6. When did Iran begin its nuclear program?
7. What is p5 plus1?
8. What was the purpose of the Start treaty?
9. Why are economic sanctions imposed?
10. What was the goal of the Anti Ballistic Missiles Treaty?

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2. #students
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4. #embassy
5. #carter
6. #sanctions
7. #imposed
8. #american
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16. #president
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20. #executive
21. #after
22. #hostage
23. #united
24. #first
25. #exiled
26. #medical
27. #inside