A United Airlines flight to Chicago returned to Raleigh-Durham International Airport shortly after takeoff Wednesday morning, after an altercation broke out between two flight attendants. “Our law enforcement team was notified by the tower that the captain had requested law enforcement to meet the aircraft,” said Mindy Hamlin, RDU spokeswoman. “The aircraft had gotten about 50 miles out when he reported a possible assault on the aircraft.” United Flight 1214, a Boeing 737-800 with 52 passengers, departed for Chicago at 6 a.m. and returned to RDU at 6:40 a.m. Airport police officers determined that no assault had taken place and...