The Federal Aviation Administration (FAA) imposed a ban on their departure that was imposed on November 13. The restrictions were in effect for more than four hours. According to a statement from Transport Secretary Sean Diffey, the airspace reopened at 20:15 ET (November 14 04:15 GMT). However, returning to a normal schedule will take time: planes and crews were not at their bases, delays and cancellations accumulated at airports. According to FlightRadar24, more than 6,600 flights were canceled and around 8,600 were delayed at the time of publication, meaning more than 15,000 flights were affected by the disruption. Storing the schedule can take a few days. According to Duffy, the failure began at 3:36 p.m. The reason was problems with the outdated communication infrastructure of air traffic control: overloading of switches and routers led to instability of incoming data. The FAA has grounded flights across the country. At the same time, there was no complete loss of radar tracking or communications: air traffic controllers continued to maintain air traffic and ensure the landing of aircraft. Before lifting the restrictions, the FAA tested the systems and confirmed their stability. Homeland Security Secretary Marquin Mullin said there is still no evidence of cyber attacks. Reuters has also reported a possible link to the L3Harris Technologies communications network, but there is no official confirmation of this version. Reports of the shutdown of all meteor strikes in the US are incorrect. The National Weather Service (NWS) continued to operate as normal. The failure affected air traffic control infrastructure, not the country's entire radar network. The event once again exacerbated the issue of the modernization of the American ATC system. Diffie estimated the required investment in #036; 50 billion.