context: Neal Page is an advertising executive in marketing trying to return to his family for Thanksgiving in Chicago after being on a business trip in New York City, but is delayed by an executive who cannot decide which mock-up will be used for an ad. After their meeting ends without a decision, Neal tries to find a cab and successfully hails one, but it is stolen by another man (Kevin Bacon in a cameo appearance). Del Griffith, a travelling salesman who sells shower curtain rings, has interfered by leaving his trunk at the edge of the street, causing Neal to fall over while racing the man for the cab. Del then unknowingly snatches a taxi ride that Neal has bought from an attorney. The two meet again at JFK Airport where they board a plane to O'Hare. Their plane is diverted to Wichita due to a blizzard in Chicago. What should have been a 1-hour and 45-minute New York-to-Chicago flight turns into a three-day ordeal, in which everything that can go wrong does.
  The pair resort to various means to try and reach Chicago, but one attempt after another is defeated either by bad luck or Del's incompetence. Forced to share a room in a cheap motel on the first night, Neal loses his temper with Del and lambastes him. In response, Del admits that he regards Neal as a cold cynic and says that despite how Neal feels, he likes himself and is liked by others because he is not afraid to be the way he is. Neal calms down and the two men go to sleep. During the night their cash is stolen by a burglar.
  The following day they attempt to reach Chicago by train. However, the locomotive breaks down, leaving the passengers stranded in a Missouri field. After reaching Jefferson City, Del sells his remaining shower curtain rings to buy bus tickets, but neglects to tell Neal that they are only valid to St. Louis. Upon arrival, Neal again offends Del over lunch and the two part ways. Neal attempts to rent a car, but finds the rented car's space at the distant rental lot empty. After walking through the cold to the airport terminal, Neal vents his anger at the rental agent to no avail. In desperation, he attempts to hail a taxi to Chicago, but insults the dispatcher who then attacks Neal. Del arrives in time to rescue Neal with his own rental car. While driving, the pair find themselves arguing again; the situation is made worse when Del nearly gets them killed on a freeway after spinning the car, driving in the wrong direction, and scraping between two semi-trailer trucks. While they take a moment to compose themselves by the side of the road, Del's carelessly discarded cigarette sets fire to the rental car. Neal initially gloats over Del's predicament, thinking that he is liable for the damage to the car. Neal's amusement quickly turns to anger when Del reveals he used Neal's credit card to rent the car after their cards were accidentally switched on the first night.
  With his credit cards destroyed in the car fire, Neal sells his designer watch to pay for a motel room for himself. Del is broke and attempts to sleep in the car, which has lost its roof in the fire. Neal eventually feels sympathy for Del and invites him in from the cold and snowy night. Neal relaxes as the two consume Del's collection of airline liquors and laugh about the events of the past two days. The pair resume driving to Chicago the next morning, but their badly damaged car is impounded by the police. They finally make it to Chicago, two days late, in the back of a refrigerator truck.
  The two men part ways at the LaSalle/Van Buren CTA station. While riding the train, Neal analyzes some of the cryptic comments Del said about his wife during the journey and becomes convinced that Del may be alone for the holiday. He returns to the station, sees Del sitting by himself and asks why he has not gone home. Del reveals that he does not have a home; his wife died eight years earlier. Neal returns home to his family and introduces them to Del, whom he has invited to Thanksgiving.
  In a post-credits scene, the same executive from the very beginning of the film is still in the conference room trying to decide which ad to choose, with a partially eaten Thanksgiving dinner on the table.
question: The main engine on the train breaks down while passing through which state?
answer: Missouri