Updated

The FAA grounded all flights nationwide on Friday for more than four hours over air traffic control communications problems, stranding sports teams ahead of weekend games. The FAA cited "extraordinary circumstances" caused by communications issues at regional air traffic control centers, and the ground stop lasted until the agency said departures could resume Friday evening. NBA, NHL and college teams scrambled for hotel rooms, rescheduled flights or chartered buses. Most college football teams playing Saturday travel the day before games, so the stoppage hit schools including Utah, Texas and Tennessee hard. Texas and Tennessee returned to campus and landed at their destinations late Friday night. Auburn took buses to Mississippi State, and the SEC moved that game's start from noon ET to 4:15 p.m. Ole Miss said it would not travel Friday night to Oklahoma. Several games were also rescheduled, including Arizona State at UCF, moved to 5:30 p.m. ET, and Baylor at BYU, moved to 7 p.m. ET. In the NBA, the Cleveland Cavaliers stayed in Miami overnight and planned to leave for Dallas at 9 a.m. Saturday, with coach Kenny Atkinson saying, "It's part of it. You just adapt." The Big Ten said all of its officials had arrived for Saturday's assignments, and NFL teams playing Sunday were expected to fly as planned.