WSJ: “The failure of a single piece of computer gear in Utah disrupted travel for thousands Thursday, exposing the risks of the long-running patchwork upgrade of the nation’s air-traffic-control system. It is the second time in 15 months that a tech glitch threw air travel into disarray across large swaths of the country. The problems took four hours to resolve, and prompted fresh calls from Congress for the Federal Aviation Administration and its private contractors to do more to prevent cascading delays caused by relatively small problems. The FAA has been struggling for years to upgrade its antiquated systems, layering modern hardware and software on top of decades-old air-traffic-control technology critical to day-to-day operations. Fully modernizing could take at least another decade and as much as $40 billion in public and private funding. Debates over who would pay and how the money would be spent have held back progress.”