An American Airlines flight underwent an emergency evacuation on an airport taxiway Saturday in New York “in response to passenger behavior near the end of the flight,” according to Republic Airways. The American Airlines flight was operated by Republic Airways. A spokesperson for the company said that the aircraft landed at LaGuardia Airport in Queens, N.Y., a borough of New York City, and conducted an "emergency evacuation." ... ...CNN reported that, according to the airline, the flight was coming from Indianapolis, Ind., to LaGuardia....