1.   American oil firms were shut out of the Iranian market five years ago when President Bill Clinton imposed a unilateral embargo.

2.   Two recent government moves have angered U.S. companies by taking the unilateral embargo a step further.

3.   Last year, Washington imposed a unilateral economic embargo against Tehran in an attempt to isolate the country.

4.   The United States continues to maintain unilateral embargoes on Libya, preventing U.S. oil firms from working in the country.

5.   Immediately after the verdict was issued, Washington urged European countries to join its unilateral economic embargo against Iran, but most EU countries have already rejected the offer.

6.   In return for that and changes to the constitution, Greece has promised to lift a unilateral economic embargo on Macedonia.

7.   The United States has repeatedly called on its allies to join its unilateral embargo on Iran, but to no avail.

8.   The United States, which slapped a unilateral economic embargo on Iran for allegedly sponsoring terrorism, put pressure on Azerbaijan to leave Tehran out of the deal.

9.   Washington has imposed a unilateral embargo on Iran which it has accused of sponsoring international terrorism.