Suspect pleads not guilty in UnitedHealthcare CEO murder case

The man accused of killing UnitedHealthcare's CEO, Luigi Mangione, pleaded not guilty to state murder and terror charges. His attorney expressed concerns about comments from New York's mayor affecting the fairness of the trial. Mangione, 26, faces multiple murder charges, including terrorism. Federal prosecutors have also filed charges, which could lead to the death penalty, while state charges carry a maximum sentence of life in prison without parole. In other news, American Airlines briefly grounded flights due to a technical issue during the busy holiday travel season. Additionally, the U.S. flu season is seeing a surge in cases, according to health officials.