US lifts nationwide flight shutdown after communications failure cancels over 5,400 flights, delays 10,000 others

The US Federal Aviation Administration lifted a nationwide ground stop on Friday after a communications failure at air traffic control centers caused chaos at airports and triggered the longest nationwide shutdown since the 11 September 2001, attacks.More than 4,700 flights were canceled and 10,000 delayed on Friday, while another 700 had already been canceled for Saturday, according to…