Nearly 7,000 flights have been delayed or cancelled across the US after the Federal Aviation Administration (FAA) ordered a nationwide ground stop following a communications failure affecting air traffic control centers. The rare shutdown, one of the few such measures since the 11 September 2001 attacks, has brought departures across the country to a halt. Law enforcement sources told CNN that the disruption does not appear to have been caused by a cyber-attack, or was it?
In a move seen only
