遭遇强冬季风暴，美国超5000架次航班被取消

Core Viewpoint - The article highlights the impact of a severe winter storm on the U.S. East Coast, leading to the cancellation of over 5,000 flights by airlines and the waiving of ticket change fees for affected airports from Virginia to Maine [1] Group 1: Flight Cancellations - Airlines have canceled more than 5,000 flights due to the forecast of a strong winter storm [1] - Approximately two-thirds of incoming flights and about 40% of outgoing flights were canceled at New York's John F. Kennedy International Airport and LaGuardia Airport on the 22nd [1] - Flight disruptions are expected to worsen on the 23rd [1] Group 2: Airline Policies - Airlines are waiving ticket change fees for passengers affected by the storm at airports along the East Coast [1]