Tehran -  Boeing Co. said Tuesday it signed an agreement with Iran Air “expressing the airline’s intent” to buy its aircraft, setting up the biggest business deal between the Islamic Republic and America since the 1979 U.S. Embassy takeover in Tehran.

Already, an Iranian official has suggested his country as a whole may purchase $25 billion in airplanes from Chicago-based Boeing, welcome news to workers on its massive assembly line north of Seattle and company stockholders.

However, the long-standing enmity between the U.S. and Iran, as well as other sanctions, still could complicate any agreement — even after last year’s nuclear deal.

Boeing issued a statement to The Associated Press saying that it signed the Iran Air agreement “under authorizations from the U.S. government following a determination that Iran had met its obligations under the nuclear accord reached last summer.”... Read More: VIN