Please answer the following question: Generate a question about the following movie plot: The movie opens with credits and title over a black background. The setting is Guayjorm, Mexico. Inside an administration building is Susan Winter (Gloria Talbott). She is asking for permission from the Governor (Vincente Padula) to fly over a restricted area of his state--the Tarahumare Mountains. She explains that she has been planning three years to rescue her fiancee, Bruce Barton, whose airplane crashed in the area. The Governor asks about her colleagues and their reasons for helping. Despite her best efforts, the Governor is adamant--the answer is no. To make sure his orders are followed he tells her he will place a police escort on the plane. As their airplane is a four place model, this means someone must stay behind.Russ Bradford (James Craig) is at a magazine stand trying to buy a sports magazine. He doesn't speak Spanish and the salesgirl (Marlene Kloss) doesn't speak English. He joins the pilot, Lee Brand (Tom Drake) and Marty Melville (Lon Chaney, Jr.) at an outdoor table for lunch. They are waiting for Susan to return from her meeting with the Governor. Susan arrives and joins them at the table. They ask how things went. She responds, "I couldn't do a thing with the Governor." Lee doesn't think there will be any problems. He has a plan for the security escort. They drive out to the landing strip and are met by a policeman (Manuel Lopez). Lee gets in the airplane and starts the engine. It would appear that Marty will stay behind as Russ and Susan board the plane. Marty lures the policeman away from the plane, a Stinson Voyager, and then decks him and boards. The prop wash wakes the policeman and he fires at the departing airplane. The tower calls the plane and orders it to return to the field. Against orders, they continue their flight towards the restricted area of the Tarahumare Mountains. During the flight, Marty explains his reason for financing part of the trip, namely Uranium exploration. Marty brought a scintillator to locate his claim. When the scintillator tops out the airplane...
A:
What tries to prevent the rest of the group from flying to safety?