According to CoinMeta, U.S. Transportation Secretary Anthony Foxx stated that officials are investigating whether the aerospace and defense contractor L3Harris Technologies is responsible for a malfunction in the air traffic control system. This malfunction caused flights across the United States to be grounded for over four hours. At a press conference, Foxx pointed out that on Friday, while L3Harris was performing work to replace copper cables with fiber optics at a remote facility of the Federal Aviation Administration (FAA), a router sent over 1,000 connection requests to other routers every 4 to 5 seconds, causing the communication system to overload and interfering with communications with aircraft as well as the transmission of some radar data. After isolating the facility, the system resumed operation. Foxx suggested that the malfunction could have been due to an installation error or a defect in the router itself, and added, "We have not yet determined the exact cause of the malfunction."