US flights gradually resuming after FAA issue. Watch: Computer glitch leaves planes grounded across US

Normal air traffic operations are resuming gradually in the US after hours of delays, the Federal Aviation Administration (FAA)

What is NOTAM? Here’s what caused the F.A.A. groundstop.

Se reanudan las salidas de vuelos tras un fallo informático que obligó a detener el tráfico aéreo en EEUU

Flight departures resume across the United States after FAA system outage. Pete Muntean and Gregory Wallace, CNN

Qué es el NOTAM, el sistema informático cuyo fallo obligó a suspender todos los vuelos nacionales en EEUU