A passenger tried to open the exit door of a United Airlines plane while it was flying from Los Angeles to the Washington, D.C, area on Tuesday night, airline and Transportation Security Administration officials said. United Flight 890 landed as scheduled at Washington Dulles International Airport at 8:35 p.m., said TSA spokeswoman Amy Kudwa. No one was injured. The passenger became unruly about 3 1/2 hours into the flight and was subdued by other passengers and federal air marshals, said United spokeswoman Megan McCarthy. "After the passenger was restrained, the pilot decided to land at Dulles," McCarthy said. "It wasn't...