[Trump receives briefing on nationwide grounding of flights] On the afternoon of November 13, Eastern Time, U.S. Secretary of Homeland Security Markwayne Marin stated that U.S. President Trump has received a briefing on the nationwide grounding of flights. According to US media reports citing people familiar with the matter, the FBI believes that the communication failure that caused the air traffic control system was not a cyberattack or criminal act. One of the current focuses of the investigation is whether the failure was caused by a software update. The Federal Aviation Administration previously ordered the grounding of all outbound flights across the country due to communication failures at air traffic control centers across the country. This means that planes already in the air can land normally, but ground flights are prohibited from taking off. U.S. Transportation Secretary Duffy said: "Due to the communication failure affecting all air traffic control centers, the Federal Aviation Administration has issued a ground grounding order for airports across the United States." It is unclear when the grounding order will be lifted. This is the second time since the 9/11 attacks in 2001 that all flights have been banned nationwide. The last time this happened was in January 2023, when the Federal Aviation Administration suspended all domestic flight departures for nearly two hours. (CCTV International News)