News Wrap: Luigi Mangione pleads not guilty to CEO's murder

In our news wrap Monday, the man accused of gunning down the head of United Health Care pleaded not guilty to multiple charges of murder, former President Bill Clinton is hospitalized in Washington, D.C. after developing a fever, automakers Nissan and Honda announce plans for a merger, and a man is facing murder and arson charges for allegedly setting a woman on fire inside a subway train.