Generate a question about the following movie plot: Casey Ryback has retired from the United States Navy and is a chef at the Mile High Cafe in Denver, Colorado. Casey is taking his estranged niece Sarah to Los Angeles to visit the grave of Sarah's father. Sarah and Casey board the Grand Continental, a train traveling from Denver to Los Angeles through the Rocky Mountains. Armed mercenaries, led by former U.S. government computer hacker and computer genius Travis Dane and mercenary leader Marcus Penn, hijack the train. Dane worked on Grazer One, a top-secret military satellite particle weapon designed to destroy underground targets. The military fired Dane because of his mental instability; Dane later faked his suicide. The mercenaries take the train's passengers and staff hostage, herding them into the last two cars. Casey kills one mercenary, then slips away. Among the hostages are two former Department of Defense colleagues who worked with Dane. Dane threatens them with torture unless they reveal the codes to take over Grazer. Despite giving up the codes, they are thrown from the train into a deep valley and killed. Middle Eastern terrorists have offered Dane $1 billion to destroy the Eastern seaboard by using Grazer to target a nuclear reactor located under the Pentagon. Dane demonstrates Grazer to investors by destroying a Chinese chemical weapons plant. After one investor offers an additional $100 million, Dane destroys an airliner carrying the investor's ex-wife. The U.S. government has difficulty locating Dane or Grazer. When officials destroy what they think is Grazer, Dane explains the NSA's premier intelligence satellite was destroyed instead. As long as the train keeps moving, his location cannot be determined. However, Casey faxes a message to the owner of the Mile High Cafe, who contacts Admiral Bates. Bates reluctantly approves a stealth bomber strike to destroy the train. Bobby Zachs, a porter who hid in a duct in the baggage car and is Casey's reluctant sidekick, discovers that they are on the wrong tracks and on a collision course with a...
Who survived Casey's bullet ?