Flights halted at three US airports as watchdog warns aircraft guidance systems are vulnerable to interference

The FAA halted arrivals at Newark Liberty, Philadelphia International and Teterboro around 10am Monday after a radio outage at Philadelphia's radar approach control left some frequencies down until early afternoon. A GAO report published the same day said systems guiding US aircraft remain vulnerable to spoofing and jamming, with unfinished risk assessments and no real-time threat detection. Senator Ron Wyden urged swift action, citing a major national security threat.