Boeing

Critics worry that the president-elect has authoritarian tendencies. With a tweet, he can hurt a company's stock or incite threats against a labor leader. His supporters say fears are overblown.

U.S. officials approved the deal in September, months after Iran emerged from sanctions.

The president-elect complained about possible cost overruns of a new version of Air Force One, picking a fight with Boeing, the American aircraft-maker.

It's a major step forward on a key portion of last year's nuclear deal with Iran, and is seen as a test case on doing business with that country. The planes will help modernize Iran's aging fleet.

The Chicago-based aircraft manufacturer is the first major U.S. company to do business in Iran since sanctions were lifted earlier this year as part of the international nuclear accord.

Because of production delays, the single-aisle, twin-engine C919 won't be on the market until at least 2018.

By 2017, the two American companies are expected to take over a job that NASA has relied upon Russia to perform: shuttling astronauts to the International Space Station.